释义：如果人与人之间的关系是建立在利益之上的，那么一旦利益消失，两人的关系也会变得疏远。
时刻准备着。你知道的越多，携带的就越少。
The best way to learn mathematics is to do mathematics.
It is impossible to live without failing at something, unless you live so cautiously that you might as well not have lived at all.
Corporate social responsibility is not a burden, but an inherent requirement for sustainable development.