B. d.
[医] 棱底向下, 颊[侧]远中的
🗣️ 情景例句
I'm sorry, but I've got to be on my way.
很抱歉，我必须走了。
Is the plain along the river good for farming?
河畔的平原易于发展农业吗？
To get a full appreciation of what this means we must turn first to some recent human inventions.
要透彻理解这句话的意义，我们应先回顾一下人类最近的几项发明。