事实上，它们被要求在淹水地区有效。

In fact, they are required to work in waterlogged area effectively.

youdao

注意溪流、排水沟和已知的淹水地区，别让你的疏散路线被切断了。

Be aware of streams, drainage channels and areas known to flood, so you or your evacuation routes are not cut off.

youdao

注意溪流、排水沟和已知的淹水地区，别让你的疏散路线被切断了。

Be aware of streams, drainage channels and areas known to flood, so you or your evacuation routes are not cut off.

youdao