SPOT的解释，在云词典中SPOT是什么意思？

SPOT

=Satellite Positioning and Tracking 人造卫星定位及跟踪

"Please, am I almost right about this? " "Not almost, sir-you're spot on."
"请问在这一点上我是否做得差不多？""先生，不是差不多，是完全正确。"
A bright spot sometimes appearing on either side of the sun, often on a luminous ring or halo.
幻日，假日有时出现在太阳旁边的一个常常形成光亮的环的明亮光斑
A cloudy spot on the cornea.
角膜翳角膜上微薄遮光点
A faint, glowing spot in the sky, exactly opposite the position of the sun.
对日照一个暗弱的、闪烁的点，位于天空中与太阳位置相对
A hole or worn spot made by abrasion or erosion.
侵蚀处由于侵蚀或磨擦形成的洞或破处
A luminous spot on a lunar halo.
幻月，假月月晕上的光斑
A single spot or pip on a playing card, die, or domino.
一点，幺点纸牌、骰子或骨牌中的幺点或一点
A ten-minute guest spot on a radio programme
电台某节目中的十分钟特约贵宾固定栏目
A tiny round mark made by or as if by a pointed instrument; a spot.
点由或象有尖头器具标记的小圆点；点
A visible trace or impression, such as a line or spot.
标记看得见的痕迹或印记，如一条线或一个点