"真是让人费解，为什么没有人购买呢？"
街头安全套售卖机成空摆设。[{'character': '街', 'pinyin': 'jie1', 'highest pitch': 10.69, 'lowest pitch': 9.99, 'duration': 0.21, 'prosody hierarchy': 'null'}, {'character': '头', 'pinyin': 'tou2', 'highest pitch': 10.49, 'lowest pitch': 6.92, 'duration': 0.27, 'prosody hierarchy': '#2'}, {'character': '安', 'pinyin': 'an1', 'highest pitch': 10.74, 'lowest pitch': 10.06, 'duration': 0.18, 'prosody hierarchy': 'null'}, {'character': '全', 'pinyin': 'qvan2', 'highest pitch': 10.65, 'lowest pitch': 6.99, 'duration': 0.18, 'prosody hierarchy': 'null'}, {'character': '套', 'pinyin': 'tao4', 'highest pitch': 10.15, 'lowest pitch': 8.01, 'duration': 0.19, 'prosody hierarchy': '#1'}, {'character': '售', 'pinyin': 'shou4', 'highest pitch': 8.78, 'lowest pitch': 7.18, 'duration': 0.14, 'prosody hierarchy': 'null'}, {'character': '卖', 'pinyin': 'mai4', 'highest pitch': 7.18, 'lowest pitch': 6.0, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '机', 'pinyin': 'ji1', 'highest pitch': 8.1, 'lowest pitch': 7.38, 'duration': 0.23, 'prosody hierarchy': '#1'}, {'character': '成', 'pinyin': 'cheng2', 'highest pitch': 7.31, 'lowest pitch': 6.1, 'duration': 0.25, 'prosody hierarchy': '#1'}, {'character': '空', 'pinyin': 'kong1', 'highest pitch': 10.56, 'lowest pitch': 6.98, 'duration': 0.23, 'prosody hierarchy': 'null'}, {'character': '摆', 'pinyin': 'bai3', 'highest pitch': 10.45, 'lowest pitch': 10.45, 'duration': 0.21, 'prosody hierarchy': 'null'}, {'character': '设', 'pinyin': 'she4', 'highest pitch': 8.71, 'lowest pitch': 7.6, 'duration': 0.28, 'prosody hierarchy': '#4'}]