• It showed their instruments, food storage, and details of how they moved and worked without gravity to give them weight.

    VOA: special.2009.07.15

  • Gravity is one force that acts on a body without the source of the force actually touching it.

    引力是一种受力物体收到了力的作用,但却没有接触施力物体的力

    耶鲁公开课 - 基础物理课程节选

  • Can you imagine ? Harvard vs. Yale football without the law of gravity?

    你能想象哈佛和耶鲁,在没有万有引力的情况下进行橄榄球赛吗?

    哈佛公开课 - 幸福课课程节选

  • Can you imagine a basketball game without the law of gravity?

    你能想象没有万有引力情况下的篮球赛吗?

    哈佛公开课 - 幸福课课程节选

  • Things would be so much easier without the law of gravity.

    如果没有万有引力,事情就易办多了。

    哈佛公开课 - 幸福课课程节选

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