Kras
n. 喀斯特（岩溶地貌）
🗣️ 情景例句
He's writing to invite me
他写信邀请我
He tries to button his own shirt,but he can't do it.
他试着扣好他的自己的衬衫，但是他不能做到。
My plane leaves at seven, so I think we'll take a taxi.
飞机7:00起飞，因此我想我们得乘出租车去。