这个问题真是棘手。
张毅发现“无孔可入”，也只好作罢。[{'character': '张', 'pinyin': 'zhang1', 'highest pitch': 11.22, 'lowest pitch': 10.82, 'duration': 0.23, 'prosody hierarchy': 'null'}, {'character': '毅', 'pinyin': 'i4', 'highest pitch': 11.22, 'lowest pitch': 8.78, 'duration': 0.18, 'prosody hierarchy': '#1'}, {'character': '发', 'pinyin': 'fa1', 'highest pitch': 10.14, 'lowest pitch': 8.78, 'duration': 0.22, 'prosody hierarchy': 'null'}, {'character': '现', 'pinyin': 'xian4', 'highest pitch': 9.58, 'lowest pitch': 7.38, 'duration': 0.29, 'prosody hierarchy': '#2'}, {'character': '无', 'pinyin': 'u2', 'highest pitch': 11.11, 'lowest pitch': 7.17, 'duration': 0.22, 'prosody hierarchy': 'null'}, {'character': '孔', 'pinyin': 'kong2', 'highest pitch': 9.06, 'lowest pitch': 7.24, 'duration': 0.24, 'prosody hierarchy': '#1'}, {'character': '可', 'pinyin': 'ke3', 'highest pitch': 8.8, 'lowest pitch': 5.23, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '入', 'pinyin': 'ru4', 'highest pitch': 8.07, 'lowest pitch': 5.63, 'duration': 0.23, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.23}, {'character': '也', 'pinyin': 'ie3', 'highest pitch': 8.62, 'lowest pitch': 5.93, 'duration': 0.15, 'prosody hierarchy': '#1'}, {'character': '只', 'pinyin': 'zhiii2', 'highest pitch': 10.13, 'lowest pitch': 5.93, 'duration': 0.15, 'prosody hierarchy': 'null'}, {'character': '好', 'pinyin': 'hao3', 'highest pitch': 9.87, 'lowest pitch': 5.59, 'duration': 0.2, 'prosody hierarchy': '#1'}, {'character': '作', 'pinyin': 'zuo4', 'highest pitch': 10.62, 'lowest pitch': 7.87, 'duration': 0.26, 'prosody hierarchy': 'null'}, {'character': '罢', 'pinyin': 'ba4', 'highest pitch': 8.15, 'lowest pitch': 6.08, 'duration': 0.27, 'prosody hierarchy': '#4'}]