underwater
/ˈʌndəˈwɔːtə(r)/adjective & adverb
- situated, occurring, or done beneath the surface of the water水下的; 供水下用的; 水下生长的; 水下操作的; 在水下, 在水中：
as adj. there are underwater volcanoes in the region该地区有水下火山
as adv. the seal spent a lot of time underwater.海豹在水下呆了很长时间。