我觉得应该先把相关概念的对应英文注明一下

马润 marines
致远星 Reach
格拉夫顿 Grafton
狂战士 Zealot
斯巴达 Spartan
投放 drop

To UNSC Grafton:
I’m Li Hua,a marine who have served the UNSC army for fifteen years. I was born and grown in Reach, and my passion for the planet makes me to defend it at all cost.
Recently, the Covenant has deployed golden armored Zealot elites ,exceeding the difficulty of our mission . I hope Grafton could drop some ODST troopers for the next operation. We don’t need Spartans,as their value is too high for this operation, if you dispatch them,not only the troops you waste,but also more opportunities might be missed .
I will be appreciated if you can respond to my request and I am looking forward to your backup.
Your sincerely,
Li Hua
写的不是很好，纯当乐子看就行

我还是拿两根棍子和一块石头打吧

To: Grafton
From: Li Hua
Subject: Request for ODST support
Dear Grafton,
I am Li Hua, a marine who has been serving in the UNSC for 15 years. I am writing to you from Reach, the planet I love and call home.
As you may know, Reach is under attack by the Covenant. They have deployed their Zealots, which are very hard to fight against. Our mission on Reach is being hindered by their overwhelming force.
We need more support from you. I request that you drop us some ODST squads for the next operation. ODSTs are elite soldiers who can drop from orbit and surprise the enemy. They are more suitable for this kind of mission than Spartans, who are too conspicuous and expensive.
Please consider my request and reply as soon as possible. We are counting on you to help us defend Reach.
Sincerely,
Li Hua
必应 写的

乐

To UNSC Grafton.
Do you hear me, Grafton, This is Sargent Li and drop your damn fatass ODSTs to the GROUND, Immediately, NOW! This golden smelly rock has taken down my fifty boys and We can’t hold this fxxking field more. When can we get your fxxking sluggish support?
By the way, DO NOT DROP THOSE GREEN GUYS HERE! I don’t wanna those crazy ugly aliens throw the everything they can find on our heads and torn me into pieces.
Li

好活

开头： hey，Grafton ，get fuck some ODST for me，or you will be crashed by The Long Night of Solace

Mayday! Mayday! The Covenant is attacking the area. Send facking reinforcements. We're losing our grip. Are there any Spartans around? We need backup. I repeat, Covenants destroyed our last defenseline They are slaughtering our marines. Where the facking reinforcements? The last of helltroopers have been dropped. Mayday! Mayday! Where are the Spartans? We don't want to die here. Are there any other UNSC troops available?

Bridge,This is Recon unit HOTLE-LIMA,please go ahead.
>>>>>>>>>>（Fast Forward）
In position.We found something.
Target confirmed,please advise.
>>>>>（Fast Forward）
WATCH OUT!.Stay frosty
(Wort Wort Wort)
What was that?
Contact!Contact!They're everywhere! We're pin down.
HQ,Requesting Archer missile surport，Danger close .HIt them hard Captain.
Incoming!Fire in the hole
>>>（Fast Forward）.
Hold the position.Please send Troopers Sir !We need reinforcements ASAP!
Fall back!Fall back !We leaving!Move your ass Private.MOVE MOVE.
LZ is hot, say again LZ is hot!Where's back up？ NOW!They. breache...AAAAAH~~~~
(Signal Lost)

应该开头，f...k unsc！

Mayday,mayday,our forces are under attack by zealots.
They are slaughting us.
We need reinforcements.
Drop odst now,Grafton.
Spartons have their missions,don't sent them there.
For Reach,for UNSC.