å½æ°çæ¦å¿µ
å¨ä¸ä¸ªååè¿ç¨ä¸ï¼åçååçéå«åéï¼æ°å¦ä¸ï¼å¸¸å¸¸ä¸ºxï¼èyåéxå¼çååèååï¼ï¼æäºæ°å¼æ¯ä¸éåéèæ¹åçï¼æ们称å®ä»¬ä¸º
常éã
èªåéï¼å½æ°ï¼ï¼ä¸ä¸ªä¸å®éæå
³èçåéï¼è¿ä¸éä¸çä»»ä½ä¸å¼é½è½å¨å®éä¸æ¾å°å¯¹åºçåºå®å¼ã
å åéï¼å½æ°ï¼ï¼éçèªåéçååèååï¼ä¸èªåéåå¯ä¸å¼æ¶ï¼å åéï¼å½æ°ï¼æä¸åªæå¯ä¸å¼ä¸å
¶ç¸å¯¹åºã
å½æ°å¼ï¼å¨yæ¯xçå½æ°ä¸ï¼xç¡®å®ä¸ä¸ªå¼ï¼yå°±éä¹ç¡®å®ä¸ä¸ªå¼ï¼å½xåaæ¶ï¼yå°±éä¹ç¡®å®ä¸ºbï¼bå°±å«åaçå½æ°å¼ã