1. Aleatory as the main feature, it has obvious difference from jitsusada contracts. 它以射幸性为主要特征，与实定合同有显著区别。
2. As the electrochemical rectifier transformer CAD system aleatory and enormous, it is divided into two parts. 由于电化学用整流变压器CAD系统较为复杂庞大，分两个部分进行研究开发。
3. The basic legal characteristic of this contract has been analyzed, the summary to the kind of the aleatory contract has been carried on subsequently. 随后对射幸合同的基本法律特征进行了分析，最后对射幸合同的种类进行了概述。
4. The aleatory contract is a special contract taking uncertain item as the contract object. It's contingent, so people generally regard it as the improper one. 射幸合同是以不确定性事项为合同标的的特殊合同，它带有很大的机会性和偶然性，所以人们一般视其为不正当的。
5. The first part talks about theoretical issues, including definition of aleatory contract based on study of historical cases, analysis of legislation and scholars'opinions; 绪论部分综述了射幸合同的研究现状，并通过案例分析引出该研究的必要性。
