Trepanation
n. 环锯术,环钻术
🔁 扩展释义
【医】 环钻术, 环锯术
🗣️ 情景例句
I can't.
我不敢读。
When did you join the oranizetion?
你什么时候加入这个团体的？
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。