释放俘虏的英文：
release the captives

参考例句：

Free Captive: Release any single captive for no ransom, but for a modest diplomatic gain.
释放俘虏:无条件地释放一个俘虏，不用赎金，这只是一个外交手段，你将赢得一点好名声。

release是什么意思：
v. 松开，排出，免除
n. 放松，发布的新闻

release (of a pollutant)
排出污染物; 放出污染物

release of nationality
国籍解除; 放弃（脱离）国籍

memorandum of release
放弃索取换地权益备忘录

margin release mechanism
极限释放机构

Someone released on probation or on parole.
在鉴定期或有条件地被释放的罪犯。

captives是什么意思：
n. [captive] 的复数形式；俘虏

The captive captivated by the apt adaptation rapped the cavity with rapture.
被灵巧的改编迷住了的被捕者着迷地敲打空腔.

kill; bag; a captive
猎获物

The prima donna captivated the audience.
首席女歌唱家使听众着了迷。

The pirates treated their captives with barbarity.
海盗们残暴地对待他们的俘虏。

Ransom Captive: Release a skilled or wealthy captive for their current ransom amount.
俘虏的赎金:释放一个有技术的或者富有的俘虏，当然是在收到等于他们目前身价的赎金之后。