...the mandatory life sentence for murder.是什么意思？

...the mandatory life sentence for murder.

谋杀罪必然会面临的终身监禁

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。

mandatory

adj. 强制的，命令的，受委托的；n. 受托者；

例句
...the mandatory retirement age of 65...
65岁的法定退休年龄

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。

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。

for

prep. 为，为了，倾向于，关于，当作；conj. 因为，由于；

例句
I've come looking for a bit of advice.
我特来讨教。

murder

n. 谋杀，杀戮，极艰难[令人沮丧]的经历；vt. 凶杀，糟蹋，打垮；vi. 杀人；

例句
He was intent on murder and he came within an ace of succeeding.
他一心想杀人并且差点就得逞了。