Karstification
n. [地]喀斯特(或岩溶)作用
🗣️ 情景例句
When he came to the States five years ago, he had only forty dollars in his pocket.
五年前他来美国时，口袋里只有40美元。
Do you often learn geography on the weekend?
你常常在周末学地理吗？
This is one example of a part-time job leading to greater things.
这是兼职工作通向更大事业的一个例子。