分析了目前普遍使用的正向推理、逆向推理、混合推理的特点和不足，根据实际开发经验对此提出了改进，并给出了具体实现方。
The paper analyses the characters and shortcoming of the forward inference , backward inference and the mixed inference which are usually used.
别忘了她对此没有经验，将需要一些时间来完成那项任务。
Don't forget that she's new to this game and will take a while to complete the task.
他说，他担心经验较少的骑行者对骑行规则缺乏认识，以及不骑车人群会对此作出强烈的负面反应。
He said he worried about inexperienced riders' lack of awareness of biking rules and strong negative reaction from non-cyclists.
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