which是什么意思

1、which，pron，哪个、哪些。

2、Which dentist did you see?你看的是哪个牙医。

3、which，那个、那些，那种情况。

4、He showed me round the town,which was very kind of him.他带我参观了这个小镇，他真是太好了。

5、These are principles which we all believe in.这些是我们所有人都相信的原则。