卢米埃尔兄弟最早的电影之一是一段30秒的短片，它展示了一个阳光普照的铁路站台的一角。
One of the Lumière Brothers' earliest films was a 30-second piece which showed a section of a railway platform flooded with sunshine.
也就是能够分开两个距离很近的两颗星的能力，单位是角秒1(seconds of arc)。
It is the ability to separate two closely-spaced stars into two distinct images measured in seconds of arc.
静态定位精度优于20角秒，比改造前的仪器提高了一个数量级。
The precision of the static orientation is better than 20 arc-seconds, improved by an order of magnitude.
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