Hotbeds
n. （坏事、暴力等的）温床( hotbed的复数形式 )
🗣️ 情景例句
Sorry, I have to say good-bye.
我不得不说再见了。
Please don't forget to say goodbye to the rest of the family for me.
请别忘了代我向你的家人告别。
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。