1. 不可数名词：方便，便利
2. 可数名词：便利的事物，方便的用具 英语解释
- the quality of being useful and convenient
- the state of being suitable or opportune
- a toilet that is available to the public
- a device or control that is very useful for a particular job
1. 不可数名词：方便，便利
2. 可数名词：便利的事物，方便的用具 英语解释