I’m on it是什麼意思?

意思是: 我來處理; 我正在處理

例句

I've received your email. Don't worry, I'm on it.
我收到了你的電子郵件, 別擔心, 我正在處理.

Can you pick up the kids from school today? I'm on it.
你今天能帶孩子從學校接回來嗎?我會處理的.