- 同学
- study in the same school
- 同学
- schoolmate
- 同学
- classmate
- 同学
- fellow student
- 同班同学
- classmate
- 通敌
- collaborate with the enemy
- 通敌
- act in collusion with the enemy
- 通力
- make a joint [or concerted] effort
- 通力合作
- make a joint [or concerted] effort
- 通力合作
- combine forces
- 通力合作
- work in close cooperation
- 同路
- go the same way
- 同路人
- fellow traveller
- 铜绿
- verdigris