The crew went there to hunt for dark dust-devil tracks on the ground.

全体研究人员前往该处寻找地面上的深色尘暴痕迹。

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There are six straight tracks on the sports ground.

运动场上有六条修直的跑道。

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There are six straight tracks on the sports ground.

运动场上有六条修直的跑道。

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