Each topology object is represented by a symbol with lines showing its relationship to other objects.

每个拓扑对象都表示为一个符号，并带有显示其与其他对象的关系的行。

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This rings are the symbol of long-lasting and pure love of lovers, and it will symbolically tie the relationship forever.

这种戒指是情侣之间永恒与纯洁爱情的象征，它可以象征性地将两人的关系永远绑在一起。

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The sock becomes a symbol of the relationship as a whole.

袜子成了整个关系的一个象征。

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The tree has become a symbol of the close and warm relationship between the people of Britain and Norway.

FORBES: Norway, Christmas and the Wisdom of Country Bumpkins

But as it unfolds, and as that rest stop takes shape as a demoralizing symbol of the sacrifices inherent in a long-distance relationship, "I-95" takes on a sincere sweetness that the band wears well.

NPR: Fountains of Wayne: Long-Distance Dedication

In this question, the relationship is simply that the symbols have nothing in common except that they are the same kind of symbol.

WSJ: Are We Really Getting Smarter? Why IQ Scores Keep Rising