He thinks that people talking loudly on their mobile phones on trains is bad behavior.
举一反三
- Mobile phones are more accessible to people than computers are.
- Maria thinks there are many bad people on the Internet.
- She thinks it’s bad manners when customers in shops and restaurants use their mobile phones.
- People who attend the Party are suggested to dress casually and turn off their mobile phones at the club.
- How does he feel about bad social behavior?