晚会在“友谊地久天久”的歌声中结束。

The party ended up with the singing of Auld Lang Syne.

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有一天他比往常还待得久一点。

One day he remained still longer than usual.

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现在，一项最新的研究发现，不需要这么久，大脑增加灰质的速度更快——是以“天”计算的。

Now comes a study finding that it’s possible to increase the brain’s gray matter quite quickly—in only a matter of days.

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