What he said means that he didn't want to go with you.
This symble means turn left.
This graph represents the area of the United State
This shows/means that you haven't turned on this machine yet
第一个1,3,4句话中的表示,代表,说明,放汉语里也都是一个意思,随便替换,你看是不是?你要也论文就多用什么illustrate,demonstrate,什么的,口语就用个show,means,represent,就行了,基本都随便用可以替换.