Fk
abbr. 外键（foreign key）
🗣️ 情景例句
She told the boss the was quitting.
她告诉老板说她打算辞职。
Would you let me know your fax number?
可以告诉我您的传真机号码吗？
The policemen could not cope with the crowds.
警察无法对付群众。