And they then wrote code, usually machine code, sometimes binary code, which was then sent by mail to a data center to be punched onto paper tape or card and then re-punched, in order to verify it.
然后她们写代码，通常是写机器代码， 偶尔写二进制代码， 这些代码通过邮件，被寄到数据中心， 打在纸带或卡片上，  反复打孔，确保无误。