我累了，不想再用清扫机了。
在放下清扫机后，万庆良改用扫帚作业。[{'character': '在', 'pinyin': 'zai4', 'highest pitch': 10.41, 'lowest pitch': 9.14, 'duration': 0.27, 'prosody hierarchy': '#1'}, {'character': '放', 'pinyin': 'fang4', 'highest pitch': 11.04, 'lowest pitch': 9.02, 'duration': 0.26, 'prosody hierarchy': 'null'}, {'character': '下', 'pinyin': 'xia4', 'highest pitch': 9.83, 'lowest pitch': 7.03, 'duration': 0.23, 'prosody hierarchy': '#2'}, {'character': '清', 'pinyin': 'qing1', 'highest pitch': 9.64, 'lowest pitch': 7.03, 'duration': 0.21, 'prosody hierarchy': 'null'}, {'character': '扫', 'pinyin': 'sao3', 'highest pitch': 9.22, 'lowest pitch': 5.46, 'duration': 0.18, 'prosody hierarchy': '#1'}, {'character': '机', 'pinyin': 'ji1', 'highest pitch': 8.34, 'lowest pitch': 7.84, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '后', 'pinyin': 'hou4', 'highest pitch': 8.89, 'lowest pitch': 4.11, 'duration': 0.27, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.32}, {'character': '万', 'pinyin': 'uan4', 'highest pitch': 10.99, 'lowest pitch': 9.07, 'duration': 0.18, 'prosody hierarchy': 'null'}, {'character': '庆', 'pinyin': 'qing4', 'highest pitch': 9.94, 'lowest pitch': 7.59, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '良', 'pinyin': 'liang2', 'highest pitch': 9.29, 'lowest pitch': 6.19, 'duration': 0.33, 'prosody hierarchy': '#2'}, {'character': '改', 'pinyin': 'gai3', 'highest pitch': 7.93, 'lowest pitch': 5.83, 'duration': 0.21, 'prosody hierarchy': 'null'}, {'character': '用', 'pinyin': 'iong4', 'highest pitch': 8.77, 'lowest pitch': 6.6, 'duration': 0.2, 'prosody hierarchy': '#1'}, {'character': '扫', 'pinyin': 'sao4', 'highest pitch': 10.79, 'lowest pitch': 7.84, 'duration': 0.25, 'prosody hierarchy': 'null'}, {'character': '帚', 'pinyin': 'zhou5', 'highest pitch': 8.27, 'lowest pitch': 5.75, 'duration': 0.15, 'prosody hierarchy': '#1'}, {'character': '作', 'pinyin': 'zuo4', 'highest pitch': 7.56, 'lowest pitch': 5.75, 'duration': 0.23, 'prosody hierarchy': 'null'}, {'character': '业', 'pinyin': 'ie4', 'highest pitch': 6.8, 'lowest pitch': 4.89, 'duration': 0.28, 'prosody hierarchy': '#4'}]