Prisoner英文释义为：a prisoner is a person who is kept in a prison as a punishment for a crime that they have committed.该词的含义最广。指关入监狱的囚犯，包括战俘。

Captives英文释义为：a person who is kept as a prisoner, especially in a war囚徒，俘虏，更偏向于指战争中抓到的俘虏。

Convict英文释义为：a person who has been found guilty of a crime and sent to prison 已决犯；服刑囚犯，强调指经判决而在狱中服刑的人。比如越狱犯即为an escaped convict

参考例句：Questions in relation to overcrowding in prisons and the standard of prisoner accommodation, as well as the need for effective training and rehabilitative programmes, were raised during the consultation process.

在协商进程中提出了涉及监狱人 满为患和囚犯住宿标准 以及必须实施有效的培训和康复方案的问题。

The increasing trend of the use of violence by pirates against their captives, both severe physical and psychological abuse, has been more frequently observed in recent studies, and highlights the crucial importance of bringing the transgressors to justice.

海盗对被俘人员使用暴 力的趋势日增，包括严重的肢体伤害和心理伤害，最 近的研究中更经常地提到这一趋势；这突出说明务必要把罪犯绳之以法。

The presence of children among the ranks of Abu Sayyaf Group (ASG) in Sulu and Basilan was also reported by former captives of ASG, although these allegations could not be verified owing to security constraints.

据苏禄和巴西兰岛的阿布沙耶夫组织被俘人员报告，该组织队伍中有儿童存在；不过出于安全原因，这些指控无法证实。

The Court further held that “where after three years from the date of sentence no decision has been made by the Executive to carry out the Court Order for execution of the convict, the death sentence shall be deemed commuted to imprisonment for life without remission”.

法院还认为，“如果在判刑日期三年之后执法者未发出执行处决罪犯的法院 命令，则死刑应被视为改判为终身监禁，不得赦免”。

For this reason, prisoners cannot be subject to inhuman or degrading treatment or punishment, including medical or scientific experimentation, nor to hardship or to constraint other than those which result directly from the deprivation of freedom.

因此不得对囚犯实施包括医学或科学实验等非人道或侮辱性的对待或惩罚；对被剥夺自由者以外的任何人，不得使之陷入困境或限制其自由。