怎么回事？
操作台突然“扯拐”，这让梁先生有点不知所措。[{'character': '操', 'pinyin': 'cao1', 'highest pitch': 10.9, 'lowest pitch': 10.51, 'duration': 0.23, 'prosody hierarchy': 'null'}, {'character': '作', 'pinyin': 'zuo4', 'highest pitch': 10.8, 'lowest pitch': 8.45, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '台', 'pinyin': 'tai2', 'highest pitch': 8.45, 'lowest pitch': 6.89, 'duration': 0.28, 'prosody hierarchy': '#1'}, {'character': '突', 'pinyin': 'tu1', 'highest pitch': 9.07, 'lowest pitch': 8.42, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '然', 'pinyin': 'ran2', 'highest pitch': 8.42, 'lowest pitch': 7.05, 'duration': 0.18, 'prosody hierarchy': '#1'}, {'character': '扯', 'pinyin': 'che2', 'highest pitch': 10.23, 'lowest pitch': 7.23, 'duration': 0.26, 'prosody hierarchy': 'null'}, {'character': '拐', 'pinyin': 'guai3', 'highest pitch': 0, 'lowest pitch': 0, 'duration': 0.3, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.27}, {'character': '这', 'pinyin': 'zhei4', 'highest pitch': 8.64, 'lowest pitch': 7.79, 'duration': 0.15, 'prosody hierarchy': 'null'}, {'character': '让', 'pinyin': 'rang4', 'highest pitch': 7.79, 'lowest pitch': 6.88, 'duration': 0.16, 'prosody hierarchy': '#1'}, {'character': '梁', 'pinyin': 'liang2', 'highest pitch': 9.11, 'lowest pitch': 6.23, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '先', 'pinyin': 'xian1', 'highest pitch': 9.92, 'lowest pitch': 7.84, 'duration': 0.22, 'prosody hierarchy': 'null'}, {'character': '生', 'pinyin': 'sheng5', 'highest pitch': 7.84, 'lowest pitch': 5.6, 'duration': 0.19, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.12}, {'character': '有', 'pinyin': 'iou2', 'highest pitch': 6.9, 'lowest pitch': 6.38, 'duration': 0.16, 'prosody hierarchy': 'null'}, {'character': '点', 'pinyin': 'dian3', 'highest pitch': 7.3, 'lowest pitch': 5.0, 'duration': 0.25, 'prosody hierarchy': '#2'}, {'character': '不', 'pinyin': 'bu4', 'highest pitch': 8.14, 'lowest pitch': 7.12, 'duration': 0.15, 'prosody hierarchy': 'null'}, {'character': '知', 'pinyin': 'zhiii1', 'highest pitch': 8.81, 'lowest pitch': 6.55, 'duration': 0.15, 'prosody hierarchy': 'null'}, {'character': '所', 'pinyin': 'suo3', 'highest pitch': 8.79, 'lowest pitch': 4.99, 'duration': 0.18, 'prosody hierarchy': 'null'}, {'character': '措', 'pinyin': 'cuo4', 'highest pitch': 8.94, 'lowest pitch': 4.99, 'duration': 0.28, 'prosody hierarchy': '#4'}]