Escape velocity is simply the speed of an object that's shot out of a cannon the minimum initial speed so that the object could later escape Earth's gravity on its own.
逃逸速度就是一个物体的速度，比如说，从加农炮中射出的最小初始速度，这样这个物体以后就可以自己脱离地球的引力。
In his favourite example, at the human genome project's initial speed, sequencing the genome should have taken thousands of years, not the 15 scheduled.
他有一个广为人知的例子，按照人类基因组计划最初的速度，整理基因组将耗时数千年，而不是计划中的十五年。
And when it swings back, it should not be able to reach any higher, provided that I do not give this object an initial speed when I stand here.
当它摆回来，它不会再往上，如果我站在这里时，不给它一个初速度。
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