Spiran
[机] 螺环化合物
🗣️ 情景例句
I'm sure I won't. I really appreciate all of your hospitality.
这点我相信。我真的很感激你的招待。
I bought 3 pounds of flour.
我买了三磅面粉。
This would solve the problem of ventilation, for if a train entered this tunnel, it would draw in fresh air behind it.
因为如果有列火车开进隧道，它就把新鲜空气随之抽进了隧道。