Vinytile
乙烯合成树脂瓦
🗣️ 情景例句
If you have any trouble, let me know.
如果你有任何的麻烦，请告诉我。
Relax!
放松一下！
where chance discoveries play a much larger part than they do in physical and mechancal industries.
同物理和机械工业相比，化学工业中偶然发现的机会要多得多。