在数学中，提出问题的艺术必须比解决问题更有价值。
In mathematics, the art of proposing a question must be held of higher value than solving it.
Investors should be wary of anyone who promises guaranteed returns.
If Biden got in, you'd be paying $7, $8, $9.
Leadership is about inspiring others to see possibilities where they once saw limits.
有人居住的世界的界限是由人类知识的范围决定的。