我想你得先定义“fit”这个词才能回答那个问题。
I guess you would have to ___define the word "fit" to answer that question.
我想你必须定义“fit”这个词才能回答那个问题。
I guess you would have to ___define the word 'fit' to answer that question.
老师让我们用简单的话来定义'友谊'这个词。
The teacher asked us to ___define the word 'friendship' in simple terms.