机场扫描系统的秘密测试结果表明，它还不能查出隐秘武器装备。
Airport screeners still fail undercover tests of their ability to spot concealed weapons.
其他因素包括国际机场扫描设备的落后，以及缺乏专业的扫描仪器。
Other factors include poor screening at international airports and a lack of specialized screening machines.
他们写道：“只用这种模式，就说使用机场扫描仪会导致癌症是很难的。 即使是常坐飞机的人，这种风险也许极其的小。
The estimation of cancer risks associated with these scans is difficult, but using the only available models, the risk would be extremely small, even among frequent fliers.
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