backwash
n. 回流，逆流；后果，反响；浪涛
例句
The skipper pushed the boat hard, creating a broad white backwash at our stern.
船长加快船速，使得船尾产生一片宽大的白色逆流。
《柯林斯英汉双解大词典》
I'm not drinking that – it has backwash in it!
我才不要喝那个漱口水呢！
Backwash the swimming pool's filters regularly.
要定期冲洗游泳池的滤水器。
