这是怎么回事？
在天津，市民也闻得到空气中呛人的味道。[{'character': '在', 'pinyin': 'zai4', 'highest pitch': 9.43, 'lowest pitch': 7.6, 'duration': 0.2, 'prosody hierarchy': '#1'}, {'character': '天', 'pinyin': 'tian1', 'highest pitch': 9.7, 'lowest pitch': 7.6, 'duration': 0.23, 'prosody hierarchy': 'null'}, {'character': '津', 'pinyin': 'jin1', 'highest pitch': 9.76, 'lowest pitch': 8.87, 'duration': 0.29, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.14}, {'character': '市', 'pinyin': 'shiii4', 'highest pitch': 11.05, 'lowest pitch': 9.91, 'duration': 0.23, 'prosody hierarchy': 'null'}, {'character': '民', 'pinyin': 'min2', 'highest pitch': 10.39, 'lowest pitch': 8.4, 'duration': 0.21, 'prosody hierarchy': '#2'}, {'character': '也', 'pinyin': 'ie3', 'highest pitch': 10.39, 'lowest pitch': 6.08, 'duration': 0.14, 'prosody hierarchy': 'null'}, {'character': '闻', 'pinyin': 'uen2', 'highest pitch': 6.08, 'lowest pitch': 5.76, 'duration': 0.17, 'prosody hierarchy': 'null'}, {'character': '得', 'pinyin': 'de5', 'highest pitch': 8.7, 'lowest pitch': 7.57, 'duration': 0.12, 'prosody hierarchy': 'null'}, {'character': '到', 'pinyin': 'dao4', 'highest pitch': 8.72, 'lowest pitch': 6.74, 'duration': 0.22, 'prosody hierarchy': '#2'}, {'character': '空', 'pinyin': 'kong1', 'highest pitch': 8.33, 'lowest pitch': 7.99, 'duration': 0.21, 'prosody hierarchy': 'null'}, {'character': '气', 'pinyin': 'qi4', 'highest pitch': 8.51, 'lowest pitch': 6.45, 'duration': 0.16, 'prosody hierarchy': 'null'}, {'character': '中', 'pinyin': 'zhong1', 'highest pitch': 9.13, 'lowest pitch': 6.45, 'duration': 0.2, 'prosody hierarchy': '#2'}, {'character': '呛', 'pinyin': 'qiang4', 'highest pitch': 11.1, 'lowest pitch': 7.73, 'duration': 0.25, 'prosody hierarchy': 'null'}, {'character': '人', 'pinyin': 'ren2', 'highest pitch': 7.73, 'lowest pitch': 5.76, 'duration': 0.17, 'prosody hierarchy': 'null'}, {'character': '的', 'pinyin': 'de5', 'highest pitch': 8.7, 'lowest pitch': 7.59, 'duration': 0.09, 'prosody hierarchy': '#1'}, {'character': '味', 'pinyin': 'uei4', 'highest pitch': 8.59, 'lowest pitch': 6.62, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '道', 'pinyin': 'dao4', 'highest pitch': 8.72, 'lowest pitch': 5.13, 'duration': 0.26, 'prosody hierarchy': '#4'}]