a commutation of the death sentence to life imprisonment是什么意思？

a commutation of the death sentence to life imprisonment

由死刑减为终身监禁

commutation

n. 交换， 折算， 折合，减刑；

例句
a commutation of the death sentence to life imprisonment
由死刑减为终身监禁

of

prep. 关于，属于…的，由…制成；aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气]；

例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

the

art. 指已提到的人（物），指说话人与听者已知的人（物），用于独一无二的事物前，与形容词最高级和序数词连用；

例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

death

n. 死亡，（某种）死法，死亡方式，病危，死神；

例句
The following year Parliament voted to abolish the death penalty for murder...
议会于翌年表决对谋杀罪废除死刑。

sentence

n. 句子，宣判；vt. 宣判，判决；

例句
Heath's appeal against the sentence was later successful...
希思对判决不服提出上诉，后来胜诉了。

to

prep. 向，朝着，到，关于，属于；adv. 朝一个方向的，到某种状态，关闭；

例句
I suggest you leave it to an expert...
我建议你把它留给专家来解决。

life

n. 生活，生计，生命，性命，一生，寿命，人生，尘世；

例句
In his later life he became even more absent-minded.
他晚年变得愈加健忘了。

imprisonment

n. 关押，监禁，“imprison”的派生；

例句
His wife was sentenced to seven years imprisonment for aiding and abetting him...
他的妻子作为他的从犯被判入狱7年。