When must all men register for the Selective Service?

所有男性到了哪个年龄必须注册“兵役登记”？

youdao

When must all males register for the Selective Service?

所有男性必须在什么时候办理兵役登记？

youdao

When must all males register for the Selective Service?

所有男性必须在什么时候办理兵役登记？

youdao