Dicinnamalacetone
二苯基壬四烯铜
🗣️ 情景例句
How was your flight?
旅途愉快吗？
Friendship cannot stand always on one side.
来而不往非礼也。
You can smoke in the entrance hall. Or outside, of course.
你可以在门厅里吸烟。当然，你也可以在室外吸烟。