sub-,在下，-merg,浸入，词源同 emerge,immerse.

1. Breaking the dam could submerge downstream cities such as Wuhan.

摧毁大坝可能会淹没下游城市，比如武汉。

2. The waters were rising about the rock and would soon submerge it.

水快涨到跟岩石一样高了，很快就会淹没它。

3. Hippos are unable to submerge in the few remaining water holes.

在仅剩的几个水坑里，河马根本无法没入水中。

4. The submarine had had time to submerge before the warship could approach.

潜水艇没等军舰靠近就及时潜入水下了。

5. The submarine can submerge very quickly.

潜艇能非常迅速地潜入水中.