Everybody has his own merits and demerits. One should never think that he is perfect while others are all good for nothing.

每个人都有自己的优点和缺点，不要把别人都看成百无一是，把自己看成十全十美。

Demerits were given to students for late attendance at prayers.

祷告会上迟到的学生被记过了。

You'll get three demerits if you're caught smoking on school grounds.

在校内抽烟一经发现将被记过失分三分。

He already has three demerits on his record.

他已被记过三次。

Each has its own merits and demerits.

它们各有特点，也都存在不足。