他听起来确实很内向，不太擅长表达自己的想法。
在外人看来，他讷于言辞，不会讲话，憨态可掬。[{'character': '在', 'pinyin': 'zai4', 'highest pitch': 10.44, 'lowest pitch': 9.77, 'duration': 0.21, 'prosody hierarchy': '#1'}, {'character': '外', 'pinyin': 'uai4', 'highest pitch': 11.34, 'lowest pitch': 8.99, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '人', 'pinyin': 'ren2', 'highest pitch': 8.99, 'lowest pitch': 6.44, 'duration': 0.16, 'prosody hierarchy': '#1'}, {'character': '看', 'pinyin': 'kan4', 'highest pitch': 8.63, 'lowest pitch': 6.48, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '来', 'pinyin': 'lai2', 'highest pitch': 7.98, 'lowest pitch': 5.71, 'duration': 0.27, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.09}, {'character': '他', 'pinyin': 'ta1', 'highest pitch': 8.43, 'lowest pitch': 8.1, 'duration': 0.18, 'prosody hierarchy': 'null'}, {'character': '讷', 'pinyin': 'ne4', 'highest pitch': 8.88, 'lowest pitch': 7.76, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '于', 'pinyin': 'v2', 'highest pitch': 8.58, 'lowest pitch': 7.17, 'duration': 0.16, 'prosody hierarchy': '#1'}, {'character': '言', 'pinyin': 'ian2', 'highest pitch': 8.4, 'lowest pitch': 6.86, 'duration': 0.22, 'prosody hierarchy': 'null'}, {'character': '辞', 'pinyin': 'cii2', 'highest pitch': 8.38, 'lowest pitch': 6.74, 'duration': 0.31, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.09}, {'character': '不', 'pinyin': 'bu2', 'highest pitch': 8.23, 'lowest pitch': 7.27, 'duration': 0.12, 'prosody hierarchy': 'null'}, {'character': '会', 'pinyin': 'huei4', 'highest pitch': 10.75, 'lowest pitch': 8.23, 'duration': 0.16, 'prosody hierarchy': '#1'}, {'character': '讲', 'pinyin': 'jiang3', 'highest pitch': 8.41, 'lowest pitch': 8.03, 'duration': 0.24, 'prosody hierarchy': 'null'}, {'character': '话', 'pinyin': 'hua4', 'highest pitch': 9.59, 'lowest pitch': 6.85, 'duration': 0.27, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.13}, {'character': '憨', 'pinyin': 'han1', 'highest pitch': 10.55, 'lowest pitch': 10.07, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '态', 'pinyin': 'tai4', 'highest pitch': 10.36, 'lowest pitch': 7.7, 'duration': 0.19, 'prosody hierarchy': '#1'}, {'character': '可', 'pinyin': 'ke3', 'highest pitch': 7.76, 'lowest pitch': 4.58, 'duration': 0.23, 'prosody hierarchy': 'null'}, {'character': '掬', 'pinyin': 'jv1', 'highest pitch': 7.74, 'lowest pitch': 7.09, 'duration': 0.31, 'prosody hierarchy': '#4'}]