“水下的”的英语可以翻译为：[医] subaqueous，submarine ...

当地渔民的渔网老是被水下的东西钩住。Local fishermen's nets kept snagging on underwater objects.钓鱼线给水下的草木根缠住了.The fishline became enmeshed in roots under the water.一池碧水被水下的灯光照亮。A pool of clear water is lit by underwater lights....