一个我自己写的句子不知道语法上有什么错误 具体的句子在补充中 并帮忙已成下中文

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一个我自己写的句子不知道语法上有什么错误 具体的句子在补充中 并帮忙已成下中文
A large number of undergraduates are eager to join the army that extremely demands advanced technology applied to mang military field.It is significant that the troop enrolls talent who possessed professional knowledge from university.

extremely修饰demand不太好吧?“极其需要”?有点儿汉语式英语的感觉,还不如把extremely去掉.
mang military field是什么?many military fields?
troop用复数才能表示部队、军队.
possess不应该用过去式,应该用单三possesses.