on one's own
with no help from others； independent自立
You are allowed to drive a car on your own．允许你独自开车。
I'm all on my own today．今天只是我一个人。
Why are you sitting all on your own？你为什么独自一个人坐在那里？
I don't need your advice， thanks． I can do it on my own．谢谢，我不需要你的忠告，我自己能做。
I can tackle problems on my own．我能独立解决问题。