始終使用止損單。
Every story is a story about death.
The vision of a champion is someone who is bent over, drenched in sweat, at the point of exhaustion when no one else is watching.
數(shù)學(xué)不僅僅是人類的發(fā)明;它具有一種獨立于我們而存在的深刻現(xiàn)實。