1·What's the first stage of a negation according to the man?
根据那个人的说法，否定的第一阶段是什么？
2·We did the first stage of the trip by train.
旅行的第一段我们乘的是火车。
—— 《牛津词典》
3·The first stage in research is data collection.
研究工作的第一步是收集资料。
—— 《牛津词典》
4·Having completed the first stage, you can move on to step 2.
第一阶段完成后，你就可以接着进行第2步了。
—— 《牛津词典》
5·That was the first stage.
这是第一阶段。
6·The first stage of the operation was to join up the bones.
手术的第一步是把骨头接上。
7·He has got a new craze, and it always takes him that way, in its first stage.
他又迷上了一种新时尚，而且一开始的时候总是把自己折腾成那样。
8·With nine engines on the first stage, Falcon 9 can reach orbit even if one or more fails.
猎鹰9号的第一级有9个引擎，即使一个或多个引擎故障，它仍然可以到达预定轨道。
9·By the mid-19th century most of Europe was in the first stage of the demographic transition.
到19世纪中叶，欧洲的大部分地区处于人口转变的第一阶段。
10·Remember the first stage of love!
回顾爱情第一阶段！