relation是名词,意思是“关系,亲戚,”它的动词形式是relate ,意思是“关联,涉及,关于,讲述”,例如:
The fee they are offering bears no relation to to the amount of work involved.  他们支付的酬金和所需的工作量无关(摘自《牛津词典》)(本句中,relation是名词,意思是“关系”)
A relation of yours is coming to see you. 你的一个亲戚来看你(本句中,relation是名词,意思是“亲戚”)
I found it difficult to relate the two ideas in my mind. 我觉得很难把两种想法联系起来(本句中,relate是动词,意思是“关联,联系”)