The system acquires information of centre-of-gravity path, which is transferred from force platform to computer via USB.
系统通过压力平板采集重心轨迹信息经USB输送到计算机。
Instead, slam a spacecraft head-on into a dangerous rock to move it in a hurry, then fine-tune it with another spacecraft by using its gravity to pull the rock into a safe path.
而用航天器撞进危险的岩石，迅速移动它的位置，然后利用另一个航天器进行微调，并利用它的重力把这块石头拖进安全轨道。
The gravitational keyhole they mention is a precise region in space, only slightly larger than the asteroid itself, in which the effect of Earth's gravity is such that it could tweak Apophis' path.
他们提到的引力关键点是天文上的一个精确地带，仅仅微大于小行星本身，在那个点上地球引力的影响可以改变小行星运行的轨迹。
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