never grow up
你为什么长不大呢？
Why don't you grow up?
你这个长不大的笨蛋
You big idiot who never grew up.
— 天才一族 (2001)
有些人永远也长不大。
Some people never grow up.
他们也长不大吗？
Do they never grow up either?
— 孤堡惊情 (2007)