天气变得寒冷，是时候点火取暖了。
时值傍晚，烟囱开始排烟。[{'character': '时', 'pinyin': 'shiii2', 'highest pitch': 10.76, 'lowest pitch': 9.5, 'duration': 0.25, 'prosody hierarchy': 'null'}, {'character': '值', 'pinyin': 'zhiii2', 'highest pitch': 10.33, 'lowest pitch': 9.45, 'duration': 0.17, 'prosody hierarchy': '#1'}, {'character': '傍', 'pinyin': 'bang4', 'highest pitch': 11.36, 'lowest pitch': 7.3, 'duration': 0.24, 'prosody hierarchy': 'null'}, {'character': '晚', 'pinyin': 'uan3', 'highest pitch': 7.3, 'lowest pitch': 1.9, 'duration': 0.3, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.21}, {'character': '烟', 'pinyin': 'ian1', 'highest pitch': 9.83, 'lowest pitch': 8.64, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '囱', 'pinyin': 'cong1', 'highest pitch': 9.74, 'lowest pitch': 9.21, 'duration': 0.29, 'prosody hierarchy': '#2'}, {'character': '开', 'pinyin': 'kai1', 'highest pitch': 9.62, 'lowest pitch': 8.79, 'duration': 0.22, 'prosody hierarchy': 'null'}, {'character': '始', 'pinyin': 'shiii3', 'highest pitch': 8.79, 'lowest pitch': 6.05, 'duration': 0.14, 'prosody hierarchy': '#1'}, {'character': '排', 'pinyin': 'pai2', 'highest pitch': 7.05, 'lowest pitch': 5.58, 'duration': 0.25, 'prosody hierarchy': 'null'}, {'character': '烟', 'pinyin': 'ian1', 'highest pitch': 9.83, 'lowest pitch': 7.05, 'duration': 0.29, 'prosody hierarchy': '#4'}]