🗣️ 情景例句
Hello.
哈喽 。
Which one is more convenient?
哪一个是比较方便的？
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。