1926年的航空法规规定，“任何没有获得航空从业执照的人，服务于一架美国注册的飞机，都是非法的。”
The Air Regulations of 1926 stated, "It shall be unlawful to serve as an airman in connection with any aircraft registered as an aircraft of the United States without an airman certificate."
他们的从业执照就像没有经验的外科医生手里那冰冷的，不近人情的手术刀，直插那些正在承受悲痛和遭遇的新鲜血肉中。
Their camera lenses are like the cold and indifferent scalpel of an inexperienced surgeon cutting into the still-warm flesh of human grief and suffering.
在美国，需要执照才能从业的工人比例在1950年是5%，到2008年是23%。
In America the proportion of workers who need a licence to operate has increased from 5% in 1950 to 23% in 2008.
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