Ethene
n. 乙烯\\n[化] 乙烯; 1,2-亚乙基
🗣️ 情景例句
Do we have to bag our own groceries?
我必须自己装我们买的商品吗？
I ate jam for breakfast yesterday.
我昨天早饭吃的是果酱。
Yes, and we must stop people walking on this floor until it's firm. It may be necessary to put up a notice saying Keep off. Another thing, we' ll have to drill a hole in the wall for the electric wires.
是的，因此在地板牢固前，我们必须防止人们从地板上行走。可能还需要竖一个布告牌，写上“不得践踏”。还有，我们必须在墙上钻一个电线孔。