内心平和，生活自然舒适。

The psychologist must be a strict empiricist.

The path to economic justice begins with recognizing the full humanity of every individual.

语言的进化是为了让我们能够闲聊。

飞蓬生长在麻地里，不用扶持也能挺立；白沙混进黑色泥土，也会跟着一起变黑。