1.Nowadays the light collected by the lens or mirror of a telescope is directed to a photographic plate rather than to the astronomer's eye.
被望远镜的透镜或反射镜所收集的光线，如今直接射到照相底板上，而不是天文学家的眼睛里。
2.Often a smudge in an old photographic plate is confused for an invading hoard of angry aliens hell-bent on giving us a bad 2012.
老胶片上的一个污点也会让人们迷惑，以为那是想在2012年毁灭我们的愤怒的外星人的侵略暗号。
3.First, the photographic plate is coated with a light-sensitive material.
首先，摄像底片是被感光材料覆盖的。
4.First, a photographic plate is coated with a light-sensitive material.
首先，一个照相底板被覆盖上感光物质；
5.The process is very simple. First, a photographic plate is coated with a light sensitive material.
这个过程非常简单，首先，把照相底片用感光材料包裹起来。
6.First, the photographic plate is coated with a light sensitive material. 8.
步骤非常简单：首先，这个摄影用的盘要涂上光敏材料。
7.At first glance it does not seem that a few black lines on a photographic plate can get us very far in understanding the stars.
乍看起来，似乎看不出照相底版上的几条黑线能给我们多少关于恒星的知识。
8.Ions of different isotopes converge at different points on the photographic plate.
在照相底板上不同的同位素的离子会聚于不同点。
9.wet plate A photographic plate produced by the wet collodion process.
湿板；湿片（材料设备）湿板照相法所产生的相片板。
10.First, a photographic plate is coated with sensitive material.
首先，一个感光的底片要被盖上感光材料。