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VOA常速英语_美洲

The Falcon 9 Rockets carried a satellite that will operate NASA's tropospheric emissions, monitoring of pollution instrument or Tempo.

猎鹰九号火箭搭载了一颗卫星,该卫星将运行NASA的监测仪器。

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TED-Ed(视频版)

VOCs and nitrous oxide react with sunlight to produce secondary pollutants called PANs and tropospheric, or ground level, ozone.

VOC 和一氧化二氮与阳光发生反应,产生称为 PAN 的二次物和或地面臭氧。

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