可谓众口难调
It's hard to say anything
以上为机器翻译结果，长、整句建议使用 人工翻译 。
对化石发现进行分类是出了名的难——对于各种生理特性重要程度的判定可谓众口难调，而且一有新发现便会编入一个新的分类单位。
Fossil finds are notoriously difficult to classify—people disagree on which physiological features are important; and each new find represents a class of one.
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