include和cover的区别
include：只能当动词使用，表示包含。
cover：除了当动词，还可以当形容词，表示.封面，封皮；盖子；掩蔽物;幌子，借口
I\'ve got three days\' holiday including New Year\'s Day.
包括元旦在内我有三天假。
It\'s 7.50, not including tax.
共计7.50英镑，不含税款。
She covered the food with a piece of cloth.
她用布把食物遮盖起来。
Get everything in writing in order to cover your back.
一切都要立字为据，以绝后患。