The scanning machines, called "backscatter scanners," deliver a dose of ionizing radiation equivalent to 1 percent or less of the radiation in a dental X-ray.
扫描机，所谓的“反射散射扫描仪”，发射出的电离辐射剂量相当于牙科辐射X射线的1%或更少。
Britain plans to use whole-body scanners and may test the backscatter system.
英国计划使用全身扫描仪，可能会测试后向散射系统。
Britain plans to use whole-body scanners and may test the backscatter system.
英国计划使用全身扫描仪，可能会测试后向散射系统。
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