Highstand
高水位期
🗣️ 情景例句
It's no big deal.
这没有什么。
Never too late to mend.
过则勿惮改。
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。