That hair comes off abruptly is trouble nature disease exempt from service portent.

头发突然脱落是患免役性疾病的征兆。

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Men in college were exempt from military service.

在校男大学生免服兵役。

《柯林斯英汉双解大词典》

Members of the service staff shall be exempt from dues and taxes on the wages which they receive for their services.

服务人员就其服务所得之工资免纳捐税。

《新英汉大辞典》

It seems there is a measure of truth in the assumption a freeman could be exempt from military service.

BBC: City limits - how free is a freeman?

He wants to end the special treatment enjoyed by ultra-orthodox Jews, who are exempt from military service and who often choose to devote their lives to studying scripture on welfare rather than working and paying tax.

BBC: Netanyahu dealt weak hand by voters

The Supreme Court has ruled that the haredim must no longer be exempt from military or national service.

ECONOMIST: Israel needs to solve a problem with its most religious Jews