The basic legal characteristic of this contract has been analyzed, the summary to the kind of the aleatory contract has been carried on subsequently.(隨后對射幸合同的基本法律特征進行了分析，最后對射幸合同的種類進行了概述。)

As the electrochemical rectifier transformer CAD system aleatory and enormous, it is divided into two parts.(由于電化學用整流變壓器CAD系統(tǒng)較為復雜龐大，分兩個部分進行研究開發(fā)。)

The first part talks about theoretical issues, including definition of aleatory contract based on study of historical cases, analysis of legislation and scholars'opinions;(緒論部分綜述了射幸合同的研究現狀，并通過案例分析引出該研究的必要性。)

Aleatory as the main feature, it has obvious difference from jitsusada contracts.(它以射幸性為主要特征，與實定合同有顯著區(qū)別。)

The general standards to judge the legitimation of aleatory contract are as follows : if the contract damages the interests of one party, interests of others, or public interests ;(判斷射幸合同合法性的一般標準是：射幸合同是否嚴重損害當事人一方利益、他人利益或社會公共利益；)

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.(射幸合同是以不確定性事項為合同標的的特殊合同，它帶有很大的機會性和偶然性，所以人們一般視其為不正當的。)