力量微薄却肩负重任,长久以来精神疲惫,若再勉强支撑,衰弱的身体必定无法承受。
A proof is a device for convincing someone else that a mathematical statement is true.
你无法管理你不衡量的东西,也无法改进你不管理的东西。
We don't inherit leather from our ancestors—we borrow it from our children.
Silence is not nothing. Silence is something.