Keelblock
n. 龙骨墩
🗣️ 情景例句
I've decided to stay at home and be a full-time mother.
我决定留在家里做一个专职母亲。
It's a deal.
一言为定。
When the instrument is situated at more than 700 miles from the earthquake centre,
如果把这种仪器安装在距震源700多英里远的地方，