重点讲解：
1. on average 平均起来；按平均值；
例句：They work 10 hours a day on average.
他们平均每天工作10个小时。
2. be based on 以…为基础；
例句：The progress of the society is based on harmony.
社会的进步是以和谐为基础的。
3. suffer from （因疾病或处于其他不利境地而）受苦，受难，受折磨；
例句：Many immigrants suffer from a sense of alienation.
许多移民因感到不容于社会而苦恼。
4. due to 由于；因为；
例句：The service did not start due to a logon failure.
由于登录失败而无法启动服务。
5. compared to 与…相比；和…比起来；
例句：His progress at school had been unspectacular compared to his brother.
和弟弟相比，他在学校里的进步很不起眼。
6. lead to 招致；致使；导致；
例句：The wording is likely to lead to ambiguity.
这种措词可能会引出歧义。
