whysn.理由whyadv.为什么conj.... 的理由；为什么int.咳；哎呀n.理由；谜Why not order both?羽绒鞋Why not come along?图赞Why Yoga Is So Hot?托松Why not go with me?变红变成红色或玫瑰红色Why are you so sad?起一个绰号Why is hemo so bad?有好转Why did I do badly?中国弯颈霉Why not go by train?智商高/低Why are you so late?溺于自怜Why is it like that?装饰，美化

1. No reason why not.
   没有什么不可以的。
2. Yes, why not?
   是的，为什么不呢?
3. I see no reason why not.
   我看不出有什么理由不这样。
4. Why not stop them (from) polluting the river?
   为什么不阻止他们污染这条河呢？
5. Yes, I don't see why not.
   是的，我看不出有什么不好。
6. Why not let her do as she likes?
   为什么不让她想怎么做就怎么做呢？
7. Must you dash off? Why not stay for a cup of tea?
   你一定要急急忙忙走吗？为何不留下喝杯茶呢？
8. The key question is in focus; why not reach a decision?
   主要问题已非常明显，为何不作出结论呢？