语言的功能在于表达，而表达的`方式是多种多样的。当一个词影响到以沟通。英语当中多功能解释性语句，就可以起到这一作用。请看下面的句子：
He is a dumb. = He is a person who can not speak.
He refused. = He said no.
Ive never seen such a stubborn person. = Ive never seen such a person who never listens to others advice.
解释性语句能帮助我们巧妙地避开一些大词，难词，又能使意思表达流畅，不失为一聪明之举。比较下面两篇文章：
Examination is a common headache to students all over the world. They all detest is, but all being domineered by it. It represents a trial; the grade its verdict.
Nowadays, examination has become a popular form of testing. It almost can dominate ones future. I am not exaggerating; for you all know it is true. If we want to obtain a diploma, we must first pass the exams. If we do not have a diploma, we may not find a job easily. That is the reason why all students are nervous and pale when they are sitting for an important examination which may concern their future.
But as long as examination is on its peak of power, we must be philosophical of it. Do not always think of the harm that it brings, but think of the good it may do to us. If we do not have exams, we may indulge ourselves in other things instead of books. Exams have to always drive us on. What is wrong for learning more and thoroughly?
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