é£ABæç弯ç©å¾è¦æä¹åæï¼æè½ç»åºç»æé£æ ·çå¢ï¼æ¯å°ABæçåä¸æ¬èæ¢ï¼ç¶åB端æ个弯è·åï¼
追çç´æ¥å°A端æªå¼ï¼ç¶åææä½ç¨å¯¹Aåç©ï¼ç»åºA端弯ç©ï¼ç¶åå°B端é ä¸ä¸ç¹ç¹å¤æªå¼ï¼åæé离ä½ï¼ç»åºB端弯ç©ï¼è¿æ¥AB两ç¹å¼¯ç©å°±æ¯ç»æäº...
追é®è½ç»åºæ¥åï¼æè¿æ¯æ²¡ç解