questioned the extent of them?

Mr.Kuchma acknowledged,indirectly,that the Nov.21 runoff had been marred by electoral violations,though he questioned the extent of them,and said he believed that Mr.Yanukovich had actually won.请问“questioned the extent of them”是什么意思?

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questioned the extent of them应指前总统Kuchma怀疑Yanukovich在大选中捣鬼（事后证明确实如此），但只有无奈接受。extent 应指选举中的作弊程度,即选举在多大程度上真实,多大程度上弄虚作假.调整一下后的意思为:库奇马先生间接承认11月21日的选举结果是有违规成分的，尽管他对违规程度表示质疑(这里表示转折,即库奇马认为虽有违规,但没有达到那样严重的程度)，并且仍然称他相信亚努科维奇确实已获胜。