你能告诉我那个机器是用来干什么的吗？
一名工作人员在美国一家机场演示如何使用“裸检”扫描仪。[{'character': '一', 'pinyin': 'i4', 'highest pitch': 10.24, 'lowest pitch': 9.36, 'duration': 0.12, 'prosody hierarchy': 'null'}, {'character': '名', 'pinyin': 'ming2', 'highest pitch': 9.36, 'lowest pitch': 8.2, 'duration': 0.25, 'prosody hierarchy': '#1'}, {'character': '工', 'pinyin': 'gong1', 'highest pitch': 11.21, 'lowest pitch': 9.25, 'duration': 0.16, 'prosody hierarchy': 'null'}, {'character': '作', 'pinyin': 'zuo4', 'highest pitch': 11.37, 'lowest pitch': 8.93, 'duration': 0.14, 'prosody hierarchy': '#1'}, {'character': '人', 'pinyin': 'ren2', 'highest pitch': 8.93, 'lowest pitch': 7.02, 'duration': 0.16, 'prosody hierarchy': 'null'}, {'character': '员', 'pinyin': 'van2', 'highest pitch': 8.33, 'lowest pitch': 6.11, 'duration': 0.32, 'prosody hierarchy': '#2'}, {'character': '在', 'pinyin': 'zai4', 'highest pitch': 9.65, 'lowest pitch': 8.47, 'duration': 0.2, 'prosody hierarchy': '#1'}, {'character': '美', 'pinyin': 'mei3', 'highest pitch': 8.47, 'lowest pitch': 4.91, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '国', 'pinyin': 'guo2', 'highest pitch': 8.53, 'lowest pitch': 6.36, 'duration': 0.14, 'prosody hierarchy': '#1'}, {'character': '一', 'pinyin': 'i4', 'highest pitch': 10.24, 'lowest pitch': 8.53, 'duration': 0.15, 'prosody hierarchy': 'null'}, {'character': '家', 'pinyin': 'jia1', 'highest pitch': 8.91, 'lowest pitch': 7.97, 'duration': 0.19, 'prosody hierarchy': '#1'}, {'character': '机', 'pinyin': 'ji1', 'highest pitch': 9.46, 'lowest pitch': 7.97, 'duration': 0.17, 'prosody hierarchy': 'null'}, {'character': '场', 'pinyin': 'chang2', 'highest pitch': 9.13, 'lowest pitch': 6.31, 'duration': 0.22, 'prosody hierarchy': '#1'}, {'character': '演', 'pinyin': 'ian3', 'highest pitch': 7.86, 'lowest pitch': 5.24, 'duration': 0.22, 'prosody hierarchy': 'null'}, {'character': '示', 'pinyin': 'shiii4', 'highest pitch': 7.64, 'lowest pitch': 5.43, 'duration': 0.3, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.21}, {'character': '如', 'pinyin': 'ru2', 'highest pitch': 11.26, 'lowest pitch': 8.25, 'duration': 0.21, 'prosody hierarchy': 'null'}, {'character': '何', 'pinyin': 'he2', 'highest pitch': 11.26, 'lowest pitch': 9.42, 'duration': 0.19, 'prosody hierarchy': '#1'}, {'character': '使', 'pinyin': 'shiii3', 'highest pitch': 10.21, 'lowest pitch': 6.37, 'duration': 0.21, 'prosody hierarchy': 'null'}, {'character': '用', 'pinyin': 'iong4', 'highest pitch': 7.77, 'lowest pitch': 6.67, 'duration': 0.19, 'prosody hierarchy': '#1'}, {'character': '裸', 'pinyin': 'luo2', 'highest pitch': 10.59, 'lowest pitch': 6.45, 'duration': 0.21, 'prosody hierarchy': 'null'}, {'character': '检', 'pinyin': 'jian2', 'highest pitch': 10.35, 'lowest pitch': 7.06, 'duration': 0.2, 'prosody hierarchy': '#1'}, {'character': '扫', 'pinyin': 'sao3', 'highest pitch': 8.5, 'lowest pitch': 5.53, 'duration': 0.16, 'prosody hierarchy': 'null'}, {'character': '描', 'pinyin': 'miao2', 'highest pitch': 6.81, 'lowest pitch': 5.53, 'duration': 0.22, 'prosody hierarchy': 'null'}, {'character': '仪', 'pinyin': 'i2', 'highest pitch': 6.81, 'lowest pitch': 5.88, 'duration': 0.27, 'prosody hierarchy': '#4'}]