æ¯ä¸ä¸ç»æç
ç¬ï¼biï¼ä»ç«¹ä»è¿ãè¿°äºè书ä¹ä¹ããåã(1) (ä¼æãä»ç«¹,ä»è¿ãâè¿â( yù),æ¯âç¬âçæ¬å,
å°ç¯è±¡ä»¥ææ§ç¬ãå¤æ¶æ¯ç¬ç¬æé½æ¯ä»¥ç«¹å¶æ,æ
ä»ç«¹ã
ç®ååâç¬â,âä»ç«¹ä»æ¯âä¼æ,ææ§æ¶ç¨çæ¯ç¬ã