我们的城市变得越来越污染了。
二零一一与二零一二年，雾霾来袭。[{'character': '二', 'pinyin': 'er4', 'highest pitch': 10.59, 'lowest pitch': 9.47, 'duration': 0.17, 'prosody hierarchy': 'null'}, {'character': '零', 'pinyin': 'ling2', 'highest pitch': 9.47, 'lowest pitch': 8.48, 'duration': 0.23, 'prosody hierarchy': '#1'}, {'character': '一', 'pinyin': 'i1', 'highest pitch': 10.18, 'lowest pitch': 9.12, 'duration': 0.18, 'prosody hierarchy': 'null'}, {'character': '一', 'pinyin': 'i1', 'highest pitch': 10.18, 'lowest pitch': 10.0, 'duration': 0.26, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.09}, {'character': '与', 'pinyin': 'v3', 'highest pitch': 13.89, 'lowest pitch': 6.32, 'duration': 0.13, 'prosody hierarchy': '#1'}, {'character': '二', 'pinyin': 'er4', 'highest pitch': 10.59, 'lowest pitch': 7.43, 'duration': 0.17, 'prosody hierarchy': 'null'}, {'character': '零', 'pinyin': 'ling2', 'highest pitch': 9.47, 'lowest pitch': 7.43, 'duration': 0.16, 'prosody hierarchy': '#1'}, {'character': '一', 'pinyin': 'i1', 'highest pitch': 10.18, 'lowest pitch': 8.25, 'duration': 0.08, 'prosody hierarchy': 'null'}, {'character': '二', 'pinyin': 'er4', 'highest pitch': 10.59, 'lowest pitch': 6.69, 'duration': 0.21, 'prosody hierarchy': 'null'}, {'character': '年', 'pinyin': 'nian2', 'highest pitch': 7.28, 'lowest pitch': 5.59, 'duration': 0.31, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.13}, {'character': '雾', 'pinyin': 'u4', 'highest pitch': 8.8, 'lowest pitch': 7.4, 'duration': 0.13, 'prosody hierarchy': 'null'}, {'character': '霾', 'pinyin': 'mai2', 'highest pitch': 7.6, 'lowest pitch': 6.7, 'duration': 0.19, 'prosody hierarchy': '#1'}, {'character': '来', 'pinyin': 'lai2', 'highest pitch': 8.43, 'lowest pitch': 6.66, 'duration': 0.23, 'prosody hierarchy': 'null'}, {'character': '袭', 'pinyin': 'xi2', 'highest pitch': 8.43, 'lowest pitch': 6.35, 'duration': 0.38, 'prosody hierarchy': '#4'}]