é¤å°å¸è¢ï¼å¯ä»¥ææçè¿æ»¤çæ°åç²å°ãå®çç¹ç¹å°±æ¯ååæçé«ãåå精度ä¹é«ãèä¸æ ¹æ®æè´¨çä¸åä»çç¹ç¹ä¹ä¸åä¾å¦æé²éçµç康å¤å¸çè¦èçãåºç¨èå´æ¯è¾å¹¿æ³æ¯å¦é¢åçµåæ°´æ³¥åãç ´ç¢çåææå£ãé çãæ²¥éæ æç«ãéåãéä¸é¢çµçççæ°ååé¢åã