Asteroid Apophis的意思|示意

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。

In 2004, NASA scientists announced that there was a chance that Apophis, an asteroid larger than two football fields, could smash into Earth in 2029.

在2004年的时候，美国航空航天局的科学家们宣布阿波菲斯这个比两个足球场还大的小行星，可能会在2029年撞击地球。

The asteroid hurtled back into the news when Russia recently predicted 99942 Apophis may hit Earth on April 13, 2036.

当俄国最近又预测阿波菲斯99942可能于2036年4月13日撞击上地球时，该小行星再次引起媒体关注。

The keyhole is just 600 metres wide, and forthcoming data are expected to show Apophis will not pass through it, ruling out further possible collisions with the asteroid for the next 100 years.

这个锁眼仅仅由600米宽，大家期望即将得到的数据可以显示阿波菲斯将不会穿过它，并在将来的100年里，我们都不会与这颗小行星来一次亲密接触。

Those satellites travel at 3.07 kilometres a second (1.9 miles), at up to 35,880 kilometres above earth -- and the Apophis asteroid will pass by earth at a distance of 32,500 kilometres.

这些卫星位于地球上方3.588万公里，运行速度为每秒3.07公里，而阿波菲斯行星则预计将在距离地球3.25万公里的地方经过。