All Perks:
Blue Perks (Slot 1)
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Marathon = Unlimited sprint 无限奔跑
Marathon Pro = Get over obstacles faster 快速过障碍
Slight of Hand = Faster reloading 快速装弹
Slight of Hand Pro = Sight your weapon faster 快速举枪
Scavenger = Full resupply from dead enemies 拾取敌人尸体上的手雷与子弹（这一代不用这个不能捡子弹）
Scavenger Pro = Extra magazines 拾取的子弹增多
Bling = 2 primary weapon attachments 主武器双配件
Bling Pro = 2 secondary weapon attachments 副武器双配件
One Man Army = Replaces your secondary weapon, allows you to change your class at any time during a match 允许你任何时候换装备，不用等下次重生，占去副武器位子
One Man Army Pro = Swaps classes even faster 换装速度变快
Red Perks (Slot 2)
Stopping Power = Increased bullet damage 子弹威力加强
Stopping Power Pro = Increased bullet damage vs. vehicles/aircraft 子弹对付killstreak载具威力增加
Lightweight = Move faster 移动加快
Lightweight Pro = Knife faster 冲刺后让你做事更快
Hardline = Killstreaks require 1 less kill 连杀少杀一个
Hardline Pro = Deathstreaks require 1 less death 连死少死一次
Cold Blooded = Undetectable by UAV, air support, sentries, and thermal 反除了心跳感应器之外的所有侦查设备
Cold Blooded Pro = No red crosshair or name when targeted 敌人的准心移到你身上将不会变红，而且你的名字不显示
Danger Close = Increases explosive weapons damage 爆炸威力增加
Danger Close Pro = Extra air support damage 空袭威力增加
Yellow Perks (Slot 3)
Commando = Increased melee distance 提升小刀的距离
Commando Pro = No fall damage 没有摔下来的伤害
Steady Aim = Increased hip-fire accuracy 盲射精准
Steady Aim Pro = Hold breath longer (ie. Iron Lungs) 狙击手的铁肺
Scrambler = Scrambles enemy mini-maps within a small radius 一定范围内干扰对方小地图
Scrambler Pro = Delay enemy Claymore explosions 对方地雷爆炸延迟
Ninja = Invisible to heartbeat sensors 反心跳感应器
Ninja Pro = Your footsteps are silent (ie. Dead Silence) 消除脚步声
SitRep = Reveals enemy explosives and Tactical Insertions (ie. Bomb Squad) 探测地雷位置与重生手雷位置
SitRep Pro = Louder enemy footsteps 敌人脚步声加大
Last Stand = Pull out your secondary after dieing 倒地手枪，好像可以移动
Last Stand Pro = Use equipment in last stand 倒在地上可以使用手雷，飞刀之类的东西
虽然大家可能都知道了，但前些天发过几个不完整版，所以不发一个完整版心里不舒服
我觉得这一代狙击手可能会变强好多，消音狙击，快手（快瞄），威力，精准（铁肺），副武器可以用散弹或者冲锋手枪，这样狙击手以前的所有弱点全部没了
