重点讲解：
1. sort of
种类；类别；品种；
eg. There are so many different sorts of mushrooms available these days.
现在可以买到许许多多不同种类的蘑菇。
A dozen trees of various sorts were planted.
一共种了12 棵不同种类的树。
2. have/take a shower
淋浴；
eg. I think I'll have a shower before dinner.
我想晚餐前洗个淋浴。
eg. She took two showers a day.
她每天洗两次淋浴。
