S-18：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!