... confidence interval method : 置信区间法 sift out the best : 挑出最好的 sift : 筛；筛分；过滤；细查；挑选 ...
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sift out the best
筛选出最好的
以上为机器翻译结果，长、整句建议使用 人工翻译 。
With the proliferation of guides out there, it is more important than ever to sift out the best -- those who are able to plan ahead, anticipate travelers' interests and react resourcefully to spontaneous ideas.
CNN: 7 of the world's savviest tour guides
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