Backscour
反向冲刷
🗣️ 情景例句
Robbie! Who is it? Robbie
是谁呀？
Neither fish nor flesh (nor good red herring).
非驴非马；不伦不类。
It was from the study of these that so much was learnt about the interior of the earth.
正是从这两种波的研究中，我们可以了解到地球内部的许多情况。