Intrados
n. 拱腹(线), 拱之下面, 内弧面
🗣️ 情景例句
Probably a lot of advertising and bills.
大概是一大堆广告和帐单。
You won't get away with this.
你逃不掉惩罚的。
easily obtainable from the lunar rocks in the form of liquid oxygen.
从月球上的岩石中很容易提炼出液态氧，