Primarily , the crimes have been set about to carry out , which is the mark distinguished the attempt of crime from the preparation of a crime ; secondly , the crimes do n ' t finished , which is the mark distinguished the attempt of crime from the accomplishment of a crime ; thirdly , the reasons that the crimes do n ' t finished are independent of the wills of the offenders , which distinguishes the criminal attempt from the desistance of a crime 即已经着手实行犯罪，因为犯罪分子意志以外的原因而未得逞的是犯罪未遂。笔者认为犯罪未遂的特征有三点：一是已经着手实行犯罪，这是犯罪未遂区别于犯罪预备的标志；二是犯罪未得逞，这是犯罪未遂区别于犯罪既遂的标志；三是犯罪未得逞是由于犯罪分子意志以外的原因，这一点把犯罪未遂与犯罪中止区别开来。
As for ordinary crime , it has the following three features : ( i ) the action of crime discontinuance should take place in special stage : ( ii ) the discontinuance of crime should be out of the will of the conductor ; ( iii ) the conductor should give up the conduction of crime for ever . and as for special crime discontinuance , it has four features , i . e . except the foregoing three features of ordinary crime discontinuance , the conductor should take effective measures to prevent the result of crime and practically avoid the happening of the crime result . the third part studies the semi - criminal discontinuance 在犯罪中止的时间性特征一节中，文章对犯罪预备阶段存在犯罪中止的可能性和必要性进行了探讨，通过与国外刑法典的规定比较，认为从世界各国刑事立法趋势来看，犯罪预备阶段的中止行为已不宜再作为犯罪中止处罚；此节中，作者还对放弃重复侵害和犯罪既遂后能否成立犯罪中止从理论上进行了深入地探讨，认为放弃重复侵害的情形下，还需要同时具备有效性条件才可能成立犯罪中止，而危险犯既遂后自动有效地防止实害结果的发生，应作为一种事后的悔罪表现，而不应归属于犯罪中止。
