心理活动总是朝向某个目的。

Data structures are the backbone of efficient algorithms.

生物圈是一种具有宇宙特征的行星现象。

The future of cinema is in the hands of those who dare to dream and have the courage to tell their stories.

事实上，今天的美国女性比以往任何时候都拥有更多的自由和机会。