Well, I’m kinda newbie in stocks market, I realised there’s this margin thing in my profile but I remember I didn’t use any margin before this, anyone can explain to me what does this margin thing represent in my profile?我本身是一位新手,然后我也尝试买了一些股,让我不解的是这个margin东西,我记得买的股都是用我户口剩的钱买的,有哪位大神能解释一下吗?