Methylmethane
[医] 乙烷
🗣️ 情景例句
We'll open a letter of credit if you promise to effect shipment one month earlier.
如果你方答应提前一个月交货，我们就同意开信用证。
Nothing for nothing.
不费力气，一无所得。
Who's that boy over there?
那边的那个男孩是谁？