1. Ovid and Horace challenge comparison with the best elegiac and lyric poets of Greece.
奥维德和贺雷西要同希腊最好的挽歌和抒情诗人争一日之长。
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2. All very admirable. But winning the election-no small challenge-seems easy by comparison.
所有的都令人称赞，但是赢得竞选，和这些相比，很容易看出，是一个不小的挑战。
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3. Another challenge is that much of the evidence most relevant to clinical decisions relates to comparisons between different interventions rather than to comparison with placebo or no intervention.
另一个挑战是，很多与临床决定最为相关的证据涉及到不同的干预措施的比较，而不是与安慰剂或不干预比较。
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4. I think this is a challenge for myself, and not a comparison with other performing artists.
我觉得这是对自己的挑战，并不是在跟其他艺人做比较。
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5. Finally, another challenge for global companies in collecting data for measurement and comparison is comparability.
最后，对于全球公司的另一项挑战是收集数据的可比性。
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6. Comparison of sow housing systems is a great challenge.
要对各种猪舍体系进行考察，不是一件简单的事情。
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7. Comparison of sow housing systems is a great challenge.
