Triolefin
三烯烃
🗣️ 情景例句
I'm presently making five thousand a month.
我目前的薪水是5000元。
Please send us your price list of quartz clocks.
请寄给我们贵方的石英钟价目单。
I'm afraid he's out. He won't be back until tomorrow.
对不起，他外出去了，明天才回来。