stand on one's own feet/leg
自主
A:I want to leave home, mum.
A:我想离开家了,妈妈。
B:Why?
B:为什么?
A:I am a grown-up, and I can stand on my own two feet.
A:我长大了,已经能够自食其力了。
B:It's all up to you.
B:由你自己决定吧!