So the man who was providing the instructions pops down the hole, and two seconds later pops right back up and says, “What have you done?!?!?
于是，提供指示的这个人突然跳进洞里，两秒后又突然伸出了脑袋：“你都干了什么？”
Out of that pops its velocity in orbit and out of it pops its radius.
然后是轨道上的速度,然后是半径。
Out of that pops its velocity in orbit and out of it pops its radius.
然后是轨道上的速度,然后是半径。
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