un·der·tow
noun/ˈʌndətəʊ/
/ˈʌndərtəʊ/
[usually singular]- a current in the sea or ocean that moves in the opposite direction to the water near the surface
回流；底流 - The children were carried out to sea by the strong undertow.
强大的潜流把孩子们卷到海里去了。
- The children were carried out to sea by the strong undertow.
- undertow (of something) a feeling or quality that influences people in a particular situation even though they may not really be aware of it
潜在的倾向（或特质）；感染力