Ponor
陡峭的落水洞
??? 情景例句
It sounds so nice.
很好聽。
One usually pricks up one's ears when his name is called.
人在被叫到自己的名字時(shí)，通常要側(cè)耳傾聽。
There are some hills in the picture, too.
畫上有一些山。