Fluorocarbobz 21
[建] 二氯氟甲烷
?? 詞語組成解析
twenty-one; [電影]決勝21點
??? 情景例句
I see her about three times a month.
我一個月見她三次。
If one side fails to observe the contract,the other side is entitled to cancel it.
如果一方不履行合同協議，另一方則有權終止合同。
The long jump
跳遠