翻译Dirty water must not be mixed with drinking water.
翻译Dirty water must not be mixed with drinking water.
Diseases are ____ through dirty drinking water.
you must not pour the dirty water here同义句
翻译Waste water and sewer drains must not be vented inside the
The water is dirty.( ) is not good for drinking.空着的用适当代词填上
drinking water with its trunk怎么读
Dirty water must be stopped from dumping into the river.同义句
单词适当形式填空 1.In this factory dirty water must be cleaned befor
The water is very dirty.There must be much p( )here.填什么?
drinking water怎么读
Well water is _____(not suitable/suitable)for drinking.
be careful not to_____the water