两个å
¬å¼å
¶å®æ¯ä¸æ ·çï¼å¯ä¸çåºå«å°±æ¯å¤ä¸ä¸ªå¸¸æ°ãè天ä½ç亮度åå»äº
对æ°ï¼æ¢èè¨ä¹ï¼aä¸é¡¹åªæ¯æ ååèçé®é¢ã
å¦äººä¸ºå®ä¹é¶çæç亮度为1ï¼é£å°±å®å
¨å¯ä»¥å¥ç¨ç¬¬ä¸ä¸ªå
¬å¼ãç¶è没æè¿æ ·å®ä¹ï¼æ¯å¦äº®åº¦ç¨
åå
æ¯æ¥è¡¨è¿°ï¼é£å°±éè¦å ä¸ä¸ªå¸¸æ°aæ¥ä¿®æ£äºã
æççå
¬å¼ç主è¦çç¾æ¯æ²¡2.5åç¸å·®ä¸çï¼äº®åº¦è¶å°æçè¶å¤§ï¼æ¥¼ä¸»çæé®åºç¶å¾ç»è´ï¼ä½æ¯æ²¡ææå°ä¸»è¦çç¾ãæ¯ç«ï¼å¤©æ奥èµä¸æ¯é«èï¼æ²¡æå¿
è¦æ¤æ¤è®¡è¾ã