提一个有关月球激光测距的问题？

From the tiny numbers returning, the astronomers have
been able to measure the movement of the Moon to an accuracy
of a centimetre or two, and this has allowed them to calculate that
the Moon is moving as Einstein said it should, to within one part
in ten trillion.

请问这句话最后一一部分的意思是什么？是精确度达到了1×10-13吗？
谢谢高手解答

不知道。，坐等高手来回答吧·

英文说的是10万亿分之一，就是你说的精度

谢谢高手的解答，哈哈。