Monosiphonous
单管的, 没有横隔壁的
🗣️ 情景例句
in your tuxedo jacket pocket.
礼服上衣口袋 。
I would like to ask you a favor.
我可以提出一个要求吗？
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。