... newton's metal 牛顿铋铅锡易熔合金 newtonian reflector 牛顿反射望远镜 newtonian telescope 牛顿望远镜 ...
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牛顿望远镜和反射折射望远镜都有一个次级反射镜(或称斜反射镜)，它们阻挡了一部分主反射镜的发射光。
Newtonian and catadioptric telescopes have secondary (or diagonal) mirrors that obstruct a small percentage of light from the primary mirror.
牛顿不用镜头，而设计制作反射式望远镜，这种望远镜利用碗状的金属镜子来聚焦来自恒星的光。
Turning away from the use of lenses, Newton devised the reflecting telescope, which makes use of a bowl-shaped metal mirror to focus the light from the stars.
伊萨克·牛顿在1668年发明了反射望远镜。
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