Sunset is when the very last bit of the sun appears to dip below the horizon.

日落之时就是太阳的最后一点降至地平线以下。

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And it was a new approach to tempo runs, Noble believes, that helped him dip below 3:00.

这也是一个新的节奏跑步法，Noble相信，这个方法让他的成绩提高到了3小时以内。

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By about 2020, the global fertility rate will dip below the global replacement rate for the first time.

到2020年左右，全球生育率将第一次低于全球生育等值替换水平。

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Unemployment may not fall much, but could dip below the psychologically powerful 4m-mark next year.

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By carefully tracking your spending, you can be sure never to dip below your comfort zone.

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The market did dip below these averages during the consolidation at lower prices levels over the summer months.

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