Travertin
n. [地]石灰华,钙华(建筑用)
🗣️ 情景例句
Do you have any other symptoms? Any more than those you've described?
你有没有其它的症状？除了那些你已叙述过的？
It is easy to open a shop but hard to keep it always open.
开设店铺易，维持常开难。
What about the Natural History Museum? So far as I know, it's free.
去自然历史博物馆怎么样？据我所知，那儿是免费的。