The basic legal characteristic of this contract has been analyzed, the summary to the kind of the aleatorycontract 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。
2
The aleatorycontract is a special contract taking uncertain item as the contract object. It's contingent, so people generally regard it as the improper one.
The first part talks about theoretical issues, including definition of aleatorycontract based on study of historical cases, analysis of legislation and scholars'opinions;