Viscol
硫化油
🗣️ 情景例句
Remember?
记得吗？
Is there a police station nearby?
这附近有没有警察局？
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。