我的表弟的一个同学参军已经5年了的翻译：My cousin a student army in 5 years 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

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My cousin a student army in 5 years

An my younger male cousin's schoolmate enlisted in the military already for 5 years

My cousin has been one of the students entering military service has 5 years

My cousin a student army in 5 years