n.回头浪;
例句:
His account had a poignant undertow of regret.
一阵悔恨向他潮水般涌来.
Caught in the undertow just caught in the undertow.
在回流中翻滚,只不过在回流中翻滚.
The pull of the undertow can drag swimmers out to sea.
近岸回流的冲力能把游泳的人涌到海里.