The only way to learn mathematics is to do mathematics.
人民就是政府,通过他们的代理人来管理它;他们就是政府,是主权权力。
失去某人,最糟糕的莫过于,他近在身旁,却犹如远在天边。
If you don't fail at least 90 percent of the time, you're not aiming high enough.