Bertrand postulate
[计] 伯特兰假设
🧩 词语组成解析
n. 伯特兰(男子名)
🗣️ 情景例句
... and if you ask what I care about, I'll tell you.
……假如你们问我关心什么， 我可以告诉你们。
A friend is not so soon gotten as lost.
交友慢，失友快。
Yes, he did.He telephoned at nine o'clock.
是的，打了。他在9点钟又打电话。