除了trait关键字，Subject看起来就像一个普通的类。
Except for the trait keyword, Subject looks like a normal class.
普通家庭每年用电约4000个字。
The average home USES about 4, 000 units of electricity a year.
普通电报起码收费是七个字。
请讲普通话，请写规范字。
大家都说普通话，大家都写规范字。
Let's all speak Standard Mandarin and use the official simplified characters.
短短五个字，却是一个普通的中国大学生对于书法的理解与诠释。
That's how I understand part of Chinese calligraphy and culture.
短短五个字，却是一个普通的中国大学生对于书法的理解与诠释。
That's how I understand part of Chinese calligraphy and culture.
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