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1·It is useless to speculate why he did it.

对他为什么这么做妄加猜测毫无用处。《牛津词典》

2·It's always hard to speculate about the future.

推测未来总是很难的。《柯林斯英汉双解大词典》

3·It's tempting to speculate about what might have happened.

大家不禁猜测，到底发生了什么事。《牛津词典》

4·This has led scientists to speculate on the existence of other galaxies.

这就使得科学家推测还有其他星系存在。《牛津词典》

5·We can speculate that the stone circles were used in some sort of pagan ceremony.

我们可以推测，这些石头排成的圆圈是用于某种异教崇拜仪式的。《牛津词典》

6·The doctors speculate that he died of a cerebral haemorrhage caused by a blow on the head.

医生们猜测他死于头部撞击引起的脑溢血。《柯林斯英汉双解大词典》

7·I mean it's interesting to speculate.

我的意思是，这是很有趣的推测。

8·He has bought himself time by refusing to speculate publicly on the cause of the blast.

他拒绝公开推测爆炸原因，为自己赢得了时间。

9·He refused to speculate on the possible effects on relations between the two governments.

他拒绝猜测这对两国政府关系可能产生的影响。

10·Other researchers speculate that sauropods ingested these stones as a source of some the minerals they needed, such as calcium.

其他研究人员推测，蜥脚类动物吞食这些石头是为了获取它们需要的一些矿物质，比如钙。

推测

1·I mean it's interesting to speculate.

我的意思是，这是很有趣的推测。

2·He has bought himself time by refusing to speculate publicly on the cause of the blast.

他拒绝公开推测爆炸原因，为自己赢得了时间。

3·We'll never really know of course, though it's interesting to speculate.

当然，我们永远也不会真正了解，尽管推测起来很有趣。

4·The foetal development of boys may also be more sensitive to this kind of chemical assault, the authors speculate, which could explain why boys are more likely to have behavioural problems than girls.

该报告的作者推测，男孩在胎儿发育阶段可能对此类化学袭击反应更为敏感，这就可以解释为什么男孩比女孩更有可能出现行为问题。

5·Researchers speculate, for example, that black men are less likely than black women to become obese, in part because within the black community they would face a higher stigma.

例如，据研究人员推测，与黑人女性相比，黑人男性肥胖的可能性更小，部分原因是由于他们在黑人社区中可能面临更大的耻辱。

猜测

1·He refused to speculate on the possible effects on relations between the two governments.

他拒绝猜测这对两国政府关系可能产生的影响。

2·We can only speculate as to how the Egyptians could have laid out these lines with such precision using only the tools they had, Dash writes.

达什写道：“我们只能猜测，在仅用当时的工具的情况下，埃及人是怎样做到如此精确地铺线的。”

3·In the report, the authors do not speculate about what caused the disparities.

在这则报道中，作者没有对差距的原因作出猜测。

4·The reason, psychologists speculate, may have something to do with our increasing reliance on digital communication and other forms of new media.

心理学家猜测，原因可能是现在的很多事情都依赖于电子交流以及其他形式的新媒体来完成。

5·“People are beginning to speculate, ” he says.

他说：“人们会禁不住开始猜测。

投机

1·They could be used to insure actual bonds but - in light of their asymmetric character - not to speculate against countries or companies.

它们可以用来给实际债券保险，但——鉴于其不对称的特点——不能用来进行针对国家或企业进行投机。

2·They provided an early indicator of trouble at investment Banks, although they became distorted as more and more firms scrambled to hedge or speculate.

虽然它们被越来越多公司用于对冲或投机因而产生歪曲，但但仍可提供投资银行遇到麻烦的早期征兆。

3·Others, including those who speculate on potential traffic of a specific domain name, say they help people find information related to what they're looking for.

而其他的，包括那些对特定域名的潜在流量投机的人，则说他们为用户找到了与他们所想要的东西的相关信息。

4·These swaps are used to speculate on the likelihood of a borrower repaying its debt.

这些互换是用来对借款人偿还贷款的可能性作投机用的。

5·Interest rates on bank deposits need to be raised in line with inflation to encourage households to keep their money in the bank rather than speculate in property or shares.

银行存款的利率应该同通胀保持一致步伐来鼓励把钱存在银行里而不是投机于房产和股票。

推断

1·California's residents have the highest exposures, which the authors speculate may be due to the state's strict flammability legislation.

加州居民接触该物质最多，研究人员推断可能是由于加州严格控制易燃物的法规造成。

2·This burglar alarm, scientists speculate, is meant to attract the attention of an even bigger creature that might be able to eat the predator and free the jellyfish.

科学家推断，这种“防盗报警器”是为了引起更大生物的注意，有可能能够吃掉它的敌人，从而将它解救出来。

3·Scientists speculate that seeing competition makes men step up their baby-making capacities.

科学家推断说看到了同性竞争让男人“做人”的能力得到提升。

4·The researchers speculate that a Neanderthal cut off the panther PAWS and kept them.

研究人员推断，第一种可能性是尼安德特人切断了豹爪，并把它们保存起来。

5·The scientists speculate that our CO2 sensor evolved to help us avoid food that’s spoiled.

研究者们据此推断，这种感知碳酸化合物的味蕾是用来帮助我们避免食用变质食物的。

思索

1·In this way, it is suitable and fruitful for students to understand and speculate the related subject matters in teaching genetics.

这种方式有利于学生的理解和思索，收到了很好的教学效果。

2·I've been speculate on my future.

我一直思索着我的未来。

(1)speculate onv. 推测；考虑