countercurrent flow 逆流
strong countercurrent 强烈的逆流
countercurrent trend 逆流趋势
A: Why is it so difficult to paddle upstream?
A：为什么向流上游划船这么难？
B: It is because of the powerful countercurrent near the bend.
B：是因为弯道附近的强劲逆流。
1) 物理学中的逆向流
2) 抽象意义上的反对潮流
1. 逆流；反对力量
noun
1. A current flowing in a direction opposite to the main current; an opposing force or trend.
Synonym: opposition, counterforce