Diazophenol
[机] 重氮氧化物
🗣️ 情景例句
going to the children's ward once or twice a week
每星期就去小儿科病房一、两次
One should travel out of his own country at least once.
我们至少应该离开自己的国度去旅行一次。
Refuse politely any cold drink from an unknown source.
应谢绝任何不明来源的冷饮。