I stopped to let the car cool off and to study the map.

我停下车，让汽车发动机冷却一下，同时查看一下地图。

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We began to study the map when the table was cleared.

桌子收拾干净后，我们就开始研究地图。

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We began to study the map when the table was cleared.

桌子收拾干净后，我们就开始研究地图。

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