此外，“月球侦察者轨道器”还在月球上发现了大量的氢，这是存在冰的关键表象。
The LRO has also detected an abundance of hydrogen, thought to be a key indicator of ice, at the poles.
即使有侦察机在半里开外盘旋，也很难发现一辆埋在雪堆里的灰色卡车。
Even when a search plane circled half a mile away, it was easy to miss a gray truck buried in snow.
我的发现促使我做些侦察工作。
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