一、 一般说来,为了保证合同全面、正确的履行,当事人应当根据合同法和双方的协议,将会同条款规定明确。然而,由于当事人缺乏订立合同的常识或者由于疏忽大意,将有些主要的条款没有订立或者规定的内容会糊不清,使得合同因条款规定不明确而难以履行。为了补救这一情况,各国合同法大部通过对空缺 First, in general, in order to ensure the contract is fully and correctly performed, the parties should clarify the terms and conditions in accordance with the contract law and the agreement of both parties. However, due to the lack of common knowledge of contracting parties or due to negligence, some of the major provisions are not made or the contents of the provisions will be ambiguous, making the contract due to the terms are not clear and difficult to fulfill. In order to remedy the situation, most of the contract law in various countries passed the vacancy