求翻译：摘要：难产是指各种因素导致分娩时间延长，单靠母体力量不能正常排出胎儿的病理过程。由于饲养管理水平的提高，孕犬的营养状况明显较以前而言偏好，犬的难产在临床上的发病率也明显增加，难产给孕犬带来风险的同时也给主人带来了不少的麻烦，各种犬猫都可能发生难产，其中微小型及小型犬，初产犬发病概率较高。本文就本人在宠物医院实习期间，接触的犬难产病例中的2例为代表，对犬难产的诊治进行了分析。是什么意思？

Abstract: dystocia refers to a variety of factors have led to prolonged labor, maternal strength alone can not be properly discharged in the pathological process of the fetus. While raising the level of feeding and management of the nutritional status of pregnant dogs is significantly higher than be

Summary: dystocia refers to various factors in extended delivery time alone, not normal maternal strength draining pathological processes of the fetus. The husbandry management improvement in the nutritional status of pregnant dogs compared with the previous statements were made by the dog, the bett

Abstract: The difficult labor is refers to each kind of factor to cause the childbirth time to lengthen, only depends on the parent substance strength not to be able to discharge embryo's pathology process normally.As a result of the raising management level enhancement, is pregnant dog's nutrition

Summary: the difficult birth refers to a variety of factors leading to prolonged labour, doesn't rely solely on the matrix forces out of the pathological processes of the fetus. Due to the improvement of feeding and management, nutritional status than the previous preference for pregnant dogs, canin

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