因为李飞宇的做法符合足协的规定和标准。
为什么足协认可李飞宇的做法？[{'character': '为', 'pinyin': 'uei4', 'highest pitch': 11.19, 'lowest pitch': 9.54, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '什', 'pinyin': 'shen2', 'highest pitch': 9.54, 'lowest pitch': 7.51, 'duration': 0.21, 'prosody hierarchy': 'null'}, {'character': '么', 'pinyin': 'me5', 'highest pitch': 8.7, 'lowest pitch': 7.63, 'duration': 0.21, 'prosody hierarchy': '#2'}, {'character': '足', 'pinyin': 'zu2', 'highest pitch': 10.83, 'lowest pitch': 7.63, 'duration': 0.21, 'prosody hierarchy': 'null'}, {'character': '协', 'pinyin': 'xie2', 'highest pitch': 10.69, 'lowest pitch': 7.71, 'duration': 0.21, 'prosody hierarchy': '#1'}, {'character': '认', 'pinyin': 'ren4', 'highest pitch': 11.36, 'lowest pitch': 8.84, 'duration': 0.24, 'prosody hierarchy': 'null'}, {'character': '可', 'pinyin': 'ke3', 'highest pitch': 8.84, 'lowest pitch': 5.1, 'duration': 0.23, 'prosody hierarchy': '#2'}, {'character': '李', 'pinyin': 'li3', 'highest pitch': 6.79, 'lowest pitch': 5.1, 'duration': 0.17, 'prosody hierarchy': 'null'}, {'character': '飞', 'pinyin': 'fei1', 'highest pitch': 10.57, 'lowest pitch': 5.92, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '宇', 'pinyin': 'v3', 'highest pitch': 10.46, 'lowest pitch': 5.35, 'duration': 0.16, 'prosody hierarchy': 'null'}, {'character': '的', 'pinyin': 'de5', 'highest pitch': 6.49, 'lowest pitch': 5.35, 'duration': 0.12, 'prosody hierarchy': '#1'}, {'character': '做', 'pinyin': 'zuo4', 'highest pitch': 7.84, 'lowest pitch': 5.78, 'duration': 0.23, 'prosody hierarchy': 'null'}, {'character': '法', 'pinyin': 'fa3', 'highest pitch': 6.51, 'lowest pitch': 5.14, 'duration': 0.35, 'prosody hierarchy': '#4'}]