Biconcavity
n. biconcave的变形
🗣️ 情景例句
Please have the porter bring my bags up.
请让搬运工把我的箱子搬到楼上去。
Seize (or Take) time by the forelock.
撤热打铁。
We can read of things that happened 5,000 years ago in the Near East,
我们从书籍中可读到5，000 年前近东发生的事情，