U. S. car and truck sales are down 13% through September this year.

今年前9个月，美国汽车和卡车销量下滑了13%。

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It 's September 1st, and we are all back to school.

九月一日，本人们都回到了学校。

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Labor day, the first Monday in September, was created by the U. S. labor movement.

把9月的第一个星期一定为劳工节是美国劳工运动的产物。

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Labor day, the first Monday in September, was created by the U. S. labor movement.

把9月的第一个星期一定为劳工节是美国劳工运动的产物。

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