因为在美国没有天敌，它们数量暴增。

With no natural predators in America, the bugs' population is soaring.

youdao

在美国没有进行过如此广泛的统计。

No such comprehensive statistic exists for the United States.

youdao

从道德角度上讲，只有对错之分，在美国没有邪恶的地位。

Morally there were only right and wrong; evil had no place in America.

youdao

Why is cancer one of the leading killers in the U. S. now but wasn't even on the charts in 1665?

为什么癌症现在是美国人的头号杀手,却甚至没有在一六六五年的名单中出现

耶鲁公开课 - 生物医学工程探索课程节选

and this I think only in the USA, New Orleans is the only other city that has cable cars.

并且在美国的其它城市中，除了新奥尔良市，没有第三个城市还有有线缆车了。

旧金山的公共交通 - SpeakingMax英语口语达人

He said Americans would always build a house but then move before they put a roof on it.

他说,美国人盖房子,总是在还没有盖上屋顶时就搬走了

耶鲁公开课 - 美国内战与重建课程节选