Backflow
n. 逆流, 回流\\n[医] 回流, 反流
🏥 医学释义
回流，返流
🗣️ 情景例句
It's a simple idea, and it will work.
这主意很简单， 而且一定可行。
It is as well to know which way the wind blows.
识时务者为俊杰。
Then knowledge began to be accumulated according to a systematic plan.
于是，知识便开始有系统有计划地积累起来。