contention [kənˈtenʃn]

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n.争论，争辩，论战；论点，主张

the disagreement that results from opposing arguments

The pay increase is the key point of contention. 加薪是争论的焦点。
The real bone of contention, as you know, is money. 你知道，争论的真正焦点是钱的问题。