before and after
之前和之后
双语对照
词典结果：
Before and After
[电影]天伦劫;
例句:
1.
Their blood and saliva levels of the chemicals were compared before and after the kiss.
研究人员对这些情侣接吻前后血液和唾液中所含的这两种化学物质的水平进行了对比。
2.
This leads to an important question: what happens to people's happiness in the periods before and after divorce?
这就引出一个重要的问题：离婚前后那段时期，人们的幸福感会发生什么样的变化？
