价的概念是理解分子结构的关键。

在网球中，心态是最重要的。

"Every story is a puzzle, and the writer's job is to put the pieces together in a way that reveals a deeper truth."

"The power of words lies not in their meaning, but in their ability to evoke emotions."

死者并非无力。死亡，并非无力。

社会系统是个人与个人之间、群体与群体之间关系的网络。