从小鼠和人的进化分道扬镳开始直到今天的7500万年里，这些区域都很保守，说明它们对生物的生存至关重要。

To have been “conserved” throughout the 75 million years since the mouse and human lineages diverged, those regions were likely to be crucial to the organisms' survival.

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五年后，两人分道扬镳。

They divorced five years later.

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回程的时候，两个扬基队球迷决定如法炮制，两人也只买了一张车票。

On the return journey the Yankees fans decide to pull the same trick and purchase only one ticket for the two of them.

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