Tetradymite
n. [矿]辉碲铋矿
🗣️ 情景例句
Mr. O'Neill is the publisher of several magazines. O'Neill
先生是好几家杂 的发行人。
Saying is one thing, and doing another.
说是一回事，做是另一回事。
What was the population of the more developed countries in 1950?
1950年较发达国家的人口是多少？