mean 动名词表达某个动作的结果或必要的事，在这种用法上，mean 可以被 involve 取代。
举例
- if you take that job in london it will mean travelling for two hours every day.
- we could take the ferry to france, but that will mean spending a night in a hotel.
- buying this jacket now means not buying another until next year.
- leaving school would mean finding a job.
mean 不定词表达一种意图或计画；在这种用法上，mean 可以被 intend 取代。
举例
- did you mean to dial this number?
- i mean to finish this job by the end of the week!
- i didn't mean to hurt you.
- i meant to return the books on time.