Astrometric Limit: The maximum residual in the place of a reference star, specified in arc seconds.
天文测量误差极限：参考星位置对应的最大误差，用角秒表示。
Visible light telescopes can resolve a piece of sky just a few arc seconds across — at least 60 times a smaller patch of sky than can be resolved with the human eye.
光学望远镜在数角秒内就能获取一张星空图—至少比肉眼能获取的大60倍。
It is the ability to separate two closely-spaced stars into two distinct images measured in seconds of arc.
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)。
In regulation, Bryant connected on three straight 3-pointers, including the game-tying shot from the arc with 17 seconds left to make it 98-98.
在比赛快要结束的时候，科比连续投中3个三分球，包括比赛结束前17秒的打平比分的一个。湖人以98平进入加时赛。
The precision of the static orientation is better than 20 arc-seconds, improved by an order of magnitude.
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.
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。
应用推荐