价的概念是理解分子结构的关键。

在投资中，舒适的东西很少是有利可图的。

To grow vegetables is to grow hope; every seed planted is a promise to the future.

The only limit to our realization of tomorrow will be our doubts of today.

What is the use of running when we are not on the right road?

工作本身就是回报。