这个问题变得越来越严重。
案件滚雪球般扩大。[{'character': '案', 'pinyin': 'an4', 'highest pitch': 10.5, 'lowest pitch': 8.84, 'duration': 0.21, 'prosody hierarchy': 'null'}, {'character': '件', 'pinyin': 'jian4', 'highest pitch': 9.35, 'lowest pitch': 7.57, 'duration': 0.29, 'prosody hierarchy': '#2'}, {'character': '滚', 'pinyin': 'guen2', 'highest pitch': 11.04, 'lowest pitch': 7.57, 'duration': 0.23, 'prosody hierarchy': 'null'}, {'character': '雪', 'pinyin': 'xve3', 'highest pitch': 11.04, 'lowest pitch': 5.49, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '球', 'pinyin': 'qiou2', 'highest pitch': 7.68, 'lowest pitch': 5.56, 'duration': 0.22, 'prosody hierarchy': 'null'}, {'character': '般', 'pinyin': 'ban1', 'highest pitch': 10.29, 'lowest pitch': 9.72, 'duration': 0.18, 'prosody hierarchy': '#1'}, {'character': '扩', 'pinyin': 'kuo4', 'highest pitch': 10.32, 'lowest pitch': 7.75, 'duration': 0.25, 'prosody hierarchy': 'null'}, {'character': '大', 'pinyin': 'da4', 'highest pitch': 10.21, 'lowest pitch': 7.45, 'duration': 0.27, 'prosody hierarchy': '#4'}]