Speleothem
n. [地]洞穴堆积物(如钟乳石)
🗣️ 情景例句
With your background and experience,
依你的背景和经验，
It takes a bit of nerve to cross these chain bridges.
过这种铁锁桥需要有点胆量才行。
At that time, however, she was not only the largest ship that had ever been built, but was regarded as unsinkable,
当时，这艘轮船不仅是造船史上建造的最大的一艘船，而且也被认为是不会沉没的。