Psychological theories must pass the test of practical experience.

计算机科学家的主要挑战不是被自己制造的复杂性所迷惑。

生活是世界上最罕见的事情。大多数人只是存在，仅此而已。

The strictness of Russian laws is softened by the non-obligatory nature of their execution.

音乐是世界的语言，没有国界。