Denitromethane
二硝甲烷
🗣️ 情景例句
She's an easy-going teacher.
她是位随和的老师。
We must make it clear from the very beginning that competitive quotations are acceptable.
必须一开始就讲清的是，有竞争力的报价可以接受。
One moment we were walking along the top of a hill and now we could see no more than about thirty metres ahead of us.
一时间我们还在山顶上行走，而现在30公尺开外的地方我们都看不清了。