但首先，他不得不跑遍这四个垒。

But first, he had to run around the four bases.

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我们有四个捕手，分布于四个垒包。

Because we carry four catchers, each base is occupied.

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我们的训练通常是基于四个垒包。

We normally like to conclude with the four-bases drill.

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四个垒围成一个菱形区域。

Together, the bases form a diamond shape.

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四个垒围成一个菱形区域。

Together, the bases form a diamond shape.

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