Cavitary
腔的, 空洞的
🗣️ 情景例句
That should do.
那应该可以了。
No, I only wrote her one letter this year.
是的，今年我才给她写过一封信。
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。