assert/contend/maintain.导航词义：坚称

1. assert:v. 坚决主张；断言.含较强的主观意味，指坚决而明确地表示某事真实无误。

She asserted that French cooking is the best in the world.

她坚称法国菜是世界上最好的。

The scientist asserted that there is no water on the moon.

那位科学家断言月球上没有水。

2. contend:v. 主张，声称.指声称某事属实，含有与他人进行争辩的意思。

He contended that it was true.

他声称那是真的。

I would contend that unemployment is the most serious social problem today.

我认为失业是当今最为严重的社会弊病。

3. maintain:v. 坚持说，坚持认为.指坚决维护某种主张或观点等。

She maintained her innocence.

她坚持自己是无辜的。

He maintains that he once saw a UFO.

他坚称自己曾看见过飞碟。

全部

1·The house costs a fortune to maintain.

维修这房子花费巨大。《柯林斯英汉双解大词典》

2·It's hard to maintain competitive pricing.

很难保持有竞争力的定价。《柯林斯英汉双解大词典》

3·The government struggled to maintain law and order.

政府努力维持治安。《牛津词典》

4·He could not maintain his maniac speed for much longer.

他不能太长时间地保持这种疯狂的速度。《柯林斯英汉双解大词典》

5·We shall maintain our focus on the needs of the customer.

我们将继续重点关注顾客的需要。《牛津词典》

6·The army has been sent in to maintain order in the capital.

军队被调进首都维持治安。《牛津词典》

7·Few people nowadays are able to maintain friendships into adulthood.

现今很少有人能够把友谊维持到成年。《柯林斯英汉双解大词典》

8·The government was right to maintain interest rates at a high level.

该政府将利率维持在一个高的层面是正确的。《柯林斯英汉双解大词典》

9·The superpowers pledged to maintain symmetry in their arms shipments.

这些超级大国承诺要在其武器运载上保持数量相等。《柯林斯英汉双解大词典》

10·By 492 votes to 391, the federation voted to maintain the status quo.

联盟以492票对391票投票决定维持现状。《柯林斯英汉双解大词典》

保持

1·It's hard to maintain competitive pricing.

很难保持有竞争力的定价。《柯林斯英汉双解大词典》

2·He could not maintain his maniac speed for much longer.

他不能太长时间地保持这种疯狂的速度。《柯林斯英汉双解大词典》

3·The superpowers pledged to maintain symmetry in their arms shipments.

这些超级大国承诺要在其武器运载上保持数量相等。《柯林斯英汉双解大词典》

4·To maintain her weight, she simply chooses fruits and vegetables over fats and sweets.

为了保持自己的体重，她选择只吃水果和蔬菜而不吃肥肉和甜食。《柯林斯英汉双解大词典》

5·Wage rates must be maintained in order to maintain the purchasing power of the consumer.

必须维持工资率以保持消费者的购买力。《柯林斯英汉双解大词典》

维护

1·Our model is easy to operate and maintain.

我们的模型易于操作和维护。

2·In some states, revenues from the gasoline tax are used to build and maintain roads.

在一些州，汽油税的收入被用来修建和维护道路。

3·The emerging system through which private companies maintain toll roads in some states is a classic BOT model.

私营公司在一些州维护收费公路的新兴系统是典型的 BOT 模式。

4·This reduces the effort to write and maintain the schema, as well as ensures that no complex type is accidentally left inextensible.

这减少了编写和维护模式的工作量，还确保了不会有某个复杂类型被偶然遗漏而不能扩展。

5·Some uniforms are also expensive to maintain, requiring professional dry cleaning rather than the home laundering possible with many types of civilian clothes.

一些制服的维护费用也很昂贵，它们不能像许多类型的便服一样在家里清洗，而是需要专业的干洗。

维持

1·The government struggled to maintain law and order.

政府努力维持治安。《牛津词典》

2·The army has been sent in to maintain order in the capital.

军队被调进首都维持治安。《牛津词典》

3·Few people nowadays are able to maintain friendships into adulthood.

现今很少有人能够把友谊维持到成年。《柯林斯英汉双解大词典》

4·The government was right to maintain interest rates at a high level.

该政府将利率维持在一个高的层面是正确的。《柯林斯英汉双解大词典》

5·By 492 votes to 391, the federation voted to maintain the status quo.

联盟以492票对391票投票决定维持现状。《柯林斯英汉双解大词典》

维修

1·The house costs a fortune to maintain.

维修这房子花费巨大。《柯林斯英汉双解大词典》

2·Supporters say open source software is more secure, cheaper to buy and maintain and easier to customize.

拥护者认为开放源代码软件更安全，购买价格及维修成本也更为低廉，并且更容易定制。《柯林斯英汉双解大词典》

3·They'll have very little information other than how you maintain the aircraft, he said.

他说“他们只有除如何维修飞机之外的很少的信息。”

4·These will be hard to maintain.

这些管线很难维修。

5·On the technical side, telegraph lines are hard to maintain.

从技术角度来说电报线路难以维修。

保养

1·The manufacturer made the car; they should know what it takes to maintain it and keep it running.

制造商制造了这辆汽车，他们应该知道如何保养它，并且试它正常运转。

2·For long missions in deep space, astronauts must maintain their own suits, learning beforehand how to fix every port and sensor on them.

在深太空的长期任务中，宇航员必须保养他们自己的太空服，提前学习如何修理身上的每个部位和传感器。

3·Maintain your tires.

保养你的轮胎。

4·The companies market, sell, and maintain their product in rural areas that do not have access to an electricity grid.

这些公司在没有电力的农村地区推广、销售和保养它们的产品。

5·When choosing between two items of clothing in a store, I always choose the one that is the easiest fabric to maintain.

当在商店里选择两件衣服时，我一直会选择面料最易保养的的那件。

维系

1·For those friends advanced in age, it is routine to congratulate their birthday to maintain friendship.

对于那些上了年纪的老朋友，为其庆祝生日以维系友情已是常规。

2·You don't need to live in the drama, to keep the story alive, to maintain suffering.

你不需要生活在那些故事中，不需要让那些故事保鲜，不需要维系痛苦。

3·The changes influence genes which help form and maintain connections between brain cells.

这些变异所影响的，是那些协助建立和维系脑细胞之间的联系的基因。

4·A failure to maintain the momentum will mean money spent so far will have been for nothing.

维系这股冲劲的失败将意味着至今花费的资金全部打了水漂。

5·Because you have responsibilities now. You have school to go to. Work to keep up with. Friendships to maintain. Yeah, I've heard this before.

因为你现在有责任了。你有书要念，有工作要跟进，有朋友要维系…是的，我以前听过。

主张

1·They maintain that as long as a doctor prescribes a drug for a legitimate medical purpose, he has done nothing illegal even if the patient USES the drug to hasten death.

他们主张，只要医生开药是为了合法的医疗目的，那么即使病人使用这种药物加速了死亡，医生也没有做什么违法的事。

2·If you've read my column for a while, you know that I try to maintain a pragmatic approach to software development.

如果您阅读过我的专栏文章的话，您就会知道我试图对软件开发主张一种实用的方法。

3·Prosecutors have questioned some of theindependent experts' findings, and maintain the evidence should stand.

控方律师分别问询了一些不同专家的发现，主张原证据有效。

4·This mysterious and wholly unaccounted for property allowed Epicurus to maintain a concept of human free will against the critics of earlier atomic theories.

这个神秘而完全不可解释的性质使伊壁鸠鲁主张人类的自由意志以对抗早期原子论的批评家们。

5·Create and maintain a proper and accessible filling system.

创建和主张一个正确的体系。

继续

1·We shall maintain our focus on the needs of the customer.

我们将继续重点关注顾客的需要。《牛津词典》

2·While I'm committed to doing what it takes to maintain the flow of credit, the American people will not excuse or tolerate such arrogance and greed.

虽然我可以为信用的流畅所需要的一切而继续努力，可美国人民却不见得会原谅和容忍这种傲慢与贪婪。

3·I know this case would be likely to end in court and, from that point, I couldn't maintain my anonymity.

我知道这个案子不太可能在法庭上结束，从这一点我也知道，我不能继续匿名下去。

4·American and British universities maintain their dominance of the chart this year, with the U.S. occupying 6 of the top 10 spots and the rest awarded to the UK.

今年，美国和英国的高校继续在排行榜上占据支配地位，美国占据了前10名中的6席，剩下的都授予了英国高校。

5·His methods were simple: install trusted African politicians, some with French nationality, as the heads of these 14 new states and maintain the firm, French grasp on their natural resources.

他的方法很简单：安排信得过的非洲政客——有些还拥有法国国籍——就任这14个新国家的首脑并且继续经营公司，法国人控制他们的自然资源。

养护

1·The house is large and difficult to maintain.

房子很大，难以养护。《牛津词典》

2·But the federal Highway Administration rejected this proposal in April, citing a federal rule that toll revenue generated on interstates may be used only to improve or maintain the road with the toll.

但是4月份联邦公路管理局否决了这一提议，凭据是一项联邦法令，后者规定州际公路产生的通行费只能用于所征收公路的修缮或养护。

3·In addition, such penal courses proved to be expensive to maintain over time.

另外，这样的惩罚性球场从长远来看得耗费高额的养护费用。

4·The structure of the equipment, the principle and method of design, exploitation and optimization in manufacture, the technical control and maintain method in its running period have been introduced.

本文介绍了膜分离装置的构成，在生产实际中进行设计、开发、优化的原则和方法，膜分离装置运行期间的工艺控制和养护方。

5·Combine practical experience maintain from highway Angle set out, to cement concrete road surface disease, produce main reason and road surface of disease maintain research synthetically.

结合实际经验从公路养护角度出发，对水泥混凝土路面病害、产生病害的主要原因以及路面综合养护进行了研究。

(1)maintain in维持…；保持…

(1)maintain order维持秩序

(1)maintain world peace维护世界和平

(1)maintain contact with与...保持联系

(1)maintain discipline维持纪律