✅ 同义词
🗣️ 情景例句
If someone doesn't buy it before then,
如果在此之前没有人买走的话。
Thank you for seeing me off.
谢谢你送行。
By the way, before leaving this subject, I would like to add a few comments.
在结束这个问题之前顺便一提，我希望能再提出一些看法。