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”？

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？

Just recently we have collected evidence of falsification by Obama on his Selective Service Application.

最近我们搜集到证据证明奥巴马在选择应用服务上做过伪造。

Sixteen days later he failed a physical and psychological exam and was given a Selective Service Class of 4-F (unfit for military service). [9]

16天后，他没能通过身体和心理上的考核，被划到了义务兵役制中的4-F等级（不适宜从军）。

Similarly in America, while "the draft" ended in 1973, laws require men to register with the Selective Service System within 30 days of their 18th birthday.

美国与此类似，当1973年“征兵草案”结束以后，法律要求人们在18岁生日之后30天内在征兵事务处注册。