本案涉及两种民事法律关系，彼此间应明确区分，这是正确处理本案的关键。第一、原告汪某与被告马某之间的关系是合同债关系；第二、原告汪某、被告马某与第三人方某之间的关系是侵权债关系；两种法律关系各具独立性，不可混为一体，故此，就原、被告间的合同纠纷，本案可以从 This case involves two kinds of civil legal relations, which should be clearly distinguished from each other. This is the key to correctly handling this case. First, the relationship between the plaintiff Wang and the defendant Ma Mou is a contractual debt relationship; secondly, the relationship between the plaintiff Wang Mou and the defendant Ma Mou and the third party Fang Mou is tort; the two legal relationships Independence, can not be mixed, therefore, on the original, the contract dispute between the defendants, the case can be from