重点讲解：
1. be based on 以…为基础；
例句：The story was based on real life.
那个故事是根据现实生活而写的。
2. be suitable for 合适的；适宜的；适当的；
例句：The simplicity of the book makes it suitable for children.
这本书简单易懂，适合儿童。
3. be up to 胜任；符合；
例句：Her school work isn't quite up to the mark.
她的功课不大符合要求。
4. mete out 以…方式给予惩罚；
例句：His father meted out punishment with a slipper.
他父亲用一只拖鞋进行惩罚。
5. due to 由于；因为；
例句：The date is lost due to a software malfunction.
由于软件故障，数据丢失。
