Difluoride
二氟化物
🗣️ 情景例句
Oh, five or six years ago.
哦，五六年前。
If you can guarantee on-time delivery with a penalty for late delivery, we can accept your sales price.
如果你能保证用惩罚延误发货方式准时发货，你的销售价我们可以接受。
If you make a mistake on the form, just cross it out.
如果填表出了错，划掉即可。