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鏀诲嚮锛屼笉鐢卞緱姘旀€ヨ触鍧忥紝缁堜簬涓嶆晫瀵规墜锛屽ぇ鍙竴澹帮細“A璁″ 附瀛愶紝鏉扮憺鍒氬垰鐪嬪埌灏辫浠庡ぉ鑰岄檷鐨勪竴鍫嗗瀮鍦惧嚮齿条可以看做是形状特殊的齿轮。大部分定传动比齿轮的齿廓形状是渐开线。
1、He made a profession of friendship to his classmate Mary..2、His classmate do not enjoy his company because he always backbite others缁濆湴姹傜敓褰扑腑钖0杈ㄤ綅鏄潪宁搁吨瑕佺殑锛屽垽鏂嚭鏁屼汉镄勮窛绂伙纴镓嶈兘旋村ソ镄勯€冭窇锛屾垨钥呮槸骞叉帀鏁屼汉锛屽鏋滃惉澹伴煶涓嶆竻。