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  • 火箭又长又细，上部有点粗，因为它的第二级比固体燃料火箭发动机驱动的第一级要厚。

    The rocket is long and slender, and fatter on top because its second stage is thicker than its solid rocket motor-powered first stage.

    youdao

  • 火箭又长又细，上部有点粗，因为它的第二级比固体燃料火箭发动机驱动的第一级要厚。

    The rocket is long and slender, and fatter on top because its second stage is thicker than its solid rocket motor-powered first stage.

    youdao

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