Karst
n. 喀斯特(区)
🗣️ 情景例句
she's still alone, without her family.
她仍是孤单单的，找不到家。
To plan a mountain climbing expedition.
计划登山探险。
This is done by a great number of ring-shaped air jets on the bottom of the craft.
船底装上大量环状喷气嘴以实现这一目的。