a tacit agreement的用法和样例：
- There's a tacit agreement between us.
- We have a tacit agreement based on only a handshake.
- As if there were a tacit agreement among the directors,they all make foreigners play the fool.
- With the club from Wuhan, the ball is indeed a tacit agreement to provide a breeding ground.
- Friendship is the combination of souls,which may get estranged and therefore is a tacit agreement between two sensitive and upright persons.