Hello Lee Kong,

What I have got is this:

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在PRV计划之前，尽管不是MH-53J的直接替代品，CV-22还是将作为AFSOC执行敌后渗入任务的平台。

Prior to the prv project, even though the MH-53 isnot a inmediate substitution, the cv-22 still is going to act for

AFSOC – platform asignments to penetrate behind enemy lines .
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I don’t know if my translation is correct, but Benny certainly will give you the correct translation.

我给你翻译句句子，但是我不知到我翻译它好不好。
本霓一定可以告诉你！

万事如意

陆蓝克