That, Dr Koechlin reckons, gives Fresnel optics a big advantage over Newtonian ones.

凯什兰博士认为，这将是菲涅尔视觉超越牛顿的设计的一大优点。

But Dr Koechlin does not worry about that, because his Fresnel telescope will be in space.

然而，凯什兰博士并不为此担心，因为他的菲涅尔望远镜将会在太空中。

When Dr Koechlin and his team pointed it at Mars they could distinguish that planet's two tiny moons-a task which would require a Newtonian telescope with a mirror at least 30cm across.

当凯什兰博士和他的团队观测火星时，他们可以分辨火星的两个微小卫星——这样的任务如果是利用牛顿的望远镜则需要一个直径最少长达30厘米的镜面。