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1·The big losers will be the undeveloped countries, especially in sub-Saharan Africa.

最大的损失者将为不发达国家，特别是撒哈拉以南的非洲国家。《柯林斯英汉双解大词典》

2·There are many people whose cultures are undeveloped, but the languages they speak are by no means primitive.

有许多人他们的文化不发达，但他们说的语言绝不是原始的。

3·The reason often given for the low regard in which smell is held is that, in comparison with its importance among animals, the human sense of smell is feeble and undeveloped.

人们通常不重视嗅觉的原因是，虽然嗅觉对于动物很重要，但人类的嗅觉是薄弱而不发达的。

4·Vast tracts of the country are wild and undeveloped.

这个国家有大片荒芜未开发的土地。《柯林斯英汉双解大词典》

5·Some villages in the world still suffer from problems such as poor road conditions, shabby toilets, dirty environment, and undeveloped basic public services.

世界上的一些农村仍遭受着很多问题，如糟糕的道路条件，破旧的厕所，肮脏的环境，以及发展不完善的公共基础服务等。

6·I like this undeveloped island.

我喜欢这座未开发的岛屿。

7·Hoarding surrounds large tracts of undeveloped land.

围栏里还圈着大量未开发的土地。

8·The landscape is uniquely primeval and rather undeveloped.

特有的原始景观，没开发过的。

9·Yetthat, in the most undeveloped parts of India, will take years.

但是达到这一目的，印度的大多数不发达地区将需要很多年时间。

10·However it remains one of the poorest, undeveloped and unstable.

然而，它也一直是最穷、最乱、最落后的地区之一。

不发达的

1·The big losers will be the undeveloped countries, especially in sub-Saharan Africa.

最大的损失者将为不发达国家，特别是撒哈拉以南的非洲国家。《柯林斯英汉双解大词典》

2·The reason often given for the low regard in which smell is held is that, in comparison with its importance among animals, the human sense of smell is feeble and undeveloped.

人们通常不重视嗅觉的原因是，虽然嗅觉对于动物很重要，但人类的嗅觉是薄弱而不发达的。

3·Yetthat, in the most undeveloped parts of India, will take years.

但是达到这一目的，印度的大多数不发达地区将需要很多年时间。

4·System factor is mainly composed of social system of undeveloped countries and the international economic system.

制度性因素主要由不发达国家自身制度和国际经济制度构成。

5·The author described its postposition system and analyzed its undeveloped characteristic.

详细描写并分析了其后置词不发达的特点。

未开发的

1·Vast tracts of the country are wild and undeveloped.

这个国家有大片荒芜未开发的土地。《柯林斯英汉双解大词典》

2·I like this undeveloped island.

我喜欢这座未开发的岛屿。

3·Hoarding surrounds large tracts of undeveloped land.

围栏里还圈着大量未开发的土地。

4·To the practicing initiate, their significance is as a reminder of his own undeveloped potentialities.

在修习密法时，本尊的意义是作为自身未开发潜质的提示。

5·China is currently one of the few undeveloped areas.

目前是中国少数未开发的地区之一。

未开化

1·It is a sound admirably suited to swamps and twilight woods which no day illustrates, suggesting a vast and undeveloped nature which men have not recognized.

这种声音最适宜于白昼都照耀不到的沼泽与阴沉沉的森林，使人想起人类还没有发现的一个广大而未开化的天性。

2·The only question open to him is whether he will be an ignorant, undeveloped one or one who has sought to reach the highest point he is capable of attaining.

他唯一 未决的 问题是：他是要做一个无知的、未开化的人，还是做一个尽自己本份力争登上人生顶峰的人。

未被开发的

1·The second-largest continent, lying south of Europe between the Atlantic and Indian oceans. The hottest continent, Africa has vast mineral resources, many of which are still undeveloped.

非洲：第二大洲，位于大西洋与印度洋之间的南部欧洲。为最炎热的洲，非洲拥有大量的矿产资源，其中许多至今未被开发。