1.descendant 后裔，子孙

These adaptations served their descendant well as they invaded land.

这些适应机制在它们的后代进化成陆生生物时起了很好的协助作用i*!Nu(Ka#eRzm;=uK;U[。

2.be made up of 由……所组成

The shape can be made up of lines, polygons, and curves.

该形状可由直线、多边形和曲线组成rcK(B~Wu8TN-Ahop!y。

3.impose 强加

Congress can impose strict conditions on the bank.

国会可能会迫使这家银行接受苛刻的条件=7Ii4EMOCmF。

4.muck in 一起干活

If we all muck in we'll soon finish the work.

如果我们大家都参加进去，很快就能完成这项工作OS~C0HfEO(8J。