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
He was carrying his son on his shoulders.l
他让儿子骑在肩上。
I'd like to have you come to my house for dinner sometime.
改天请到我家来吃饭。
No, not any more. It used to be free but now you have to pay to get in.
不，不再免费了。过去是免费，可现在得付钱才能进去呢。