I need to divide it by three to get the average.

我应该先除3得到平均数

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Her plan can vary for drivers in an endurance race in which three different drivers divide their time behind the wheel of a single car.

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Modern mammals divide into three overarching groups: the placentals (most species, including man), the marsupials (kangaroos and their like) and the monotremes (the egg-laying platypus and echidnas).

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Broadly, such concerns divide into three sorts.

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