Nitroxide
硝基氧
🗣️ 情景例句
and wrote to his wife Martha.
给他妻子Martha写信。
You won't die for asking.
问一下又不会死。
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。