他们会：一个近地天体可能是出现在大约3000万英里的地球轨道内的任何小行星或彗星。
And they'll want to: an NEO is any asteroid or comet that will come within about 30 million miles of Earth's orbit.
他们会：一个近地天体可能是出现在大约3000万英里的地球轨道内的任何小行星或彗星。
And they'll want to: an NEO is any asteroid or comet that will come within about 30 million miles of Earth's orbit.
应用推荐