Mathematics is not a spectator sport; you have to play to understand.
市场组合是所有投资者都应持有的唯一风险组合。
In the end, we will remember not the words of our enemies, but the silence of our friends.
在快速变化的市场中,只有不断学习和适应,才能保持竞争力。
Only by continuous learning can we make continuous progress.