Behavior, as such, is not to be regarded as a mere chain of muscular contractions, but rather as a purposive and cognitive affair.

电影的美在于它允许我们以一种其他艺术形式无法做到的方式探索人类情感和经验的深度。

To promote the high-quality development of the coal industry, we must rely on technological innovation and intelligent upgrading.

数学研究是所有自然现象精确知识不可或缺的基础。