目前还没有任何设备发现太阳系外的卫星，不过一些研究者认为人类具有探测到系外卫星的能力——甚至分析它们是否适合居住——可能已初现端倪。
No one has yet discovered any extrasolar moons, but some researchers think the capacity to detect them-and even analyze them for habitability-may be just over the horizon.
没有卫星的探测，我们很难发现冰川在变化，因为几乎没有人会来到这个世界上最遥远的地方。
Without satellite observations, it would be very difficult to know if the glaciers are changing, as so few people come to this most remote part of the world.
卫星无法探测到它们的踪迹，如果不是在非常风平浪静的日子，你即使站在帆船的甲板上也无法发现这些祸害。
They are invisible to satellites, and except on very calm days youwon’t even see them from the deck of a sailboat.
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