后来的祖先生活在陆地上，并在那里居住了一代又一代。

Later ancestors lived on land and stayed there for a very large number of generations.

youdao

youdao

一代又一代的丝绸之路旅行者架起了和平与东西方合作的桥梁。

Generation after generation, the silk routes travelers have built a bridge for peace and East-West cooperation.

youdao

I don't know how many kids, generation after generation, get in trouble because they do not remember the following fact.

我不知道有多少孩子,一代又一代,因为没有记住下面的内容而遇到困难

耶鲁公开课 - 基础物理课程节选