The country's second lunar probe, known as the Chang 'e 2, has reached an orbit of 1.5 million kilometers from earth.
国家第二个月球探测器，嫦娥二号，已经飞抵距离地球150万公里的一个轨道上。
2
What can we do to avoid a Wall-E scenario in which the Earth is surrounded by a solid barrier of junk?
如何才能避免出现电影"机器人总动员"描述的那种地球被一层固体垃圾屏障包围的情况？
3
There were green turtles in our seas e ons before dinosaurs tramped the Earth; they survived the last ice age; but they may not be with us much longer.