1.come back回来；恢复(知觉、记忆等）；回想起；卷土重来；重新流行；反驳

例句：There is no telling when she will come back.
说不准她什么时候回来。

2.in such a case在这种情况下

例句：In such a case,he should call the physician.
在这种情况下，他应该请医生。

3. laid down沉积

例句：They say that certain chemicals are made and laid down in the living cells.
他们说已在活细胞内培养出某些化学成分，并已沉积下来。

4.as soon as一 ... 就

例句：I'll write you as soon as I get there.
我一到那儿，就给你写信。