这需要非常高的体力和耐力。
这相当于每天跑两次马拉松。[{'character': '这', 'pinyin': 'zhe4', 'highest pitch': 9.24, 'lowest pitch': 8.52, 'duration': 0.16, 'prosody hierarchy': '#1'}, {'character': '相', 'pinyin': 'xiang1', 'highest pitch': 9.78, 'lowest pitch': 8.63, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '当', 'pinyin': 'dang1', 'highest pitch': 9.73, 'lowest pitch': 8.76, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '于', 'pinyin': 'v2', 'highest pitch': 9.04, 'lowest pitch': 7.5, 'duration': 0.22, 'prosody hierarchy': '#2'}, {'character': '每', 'pinyin': 'mei3', 'highest pitch': 9.34, 'lowest pitch': 5.31, 'duration': 0.25, 'prosody hierarchy': 'null'}, {'character': '天', 'pinyin': 'tian1', 'highest pitch': 9.21, 'lowest pitch': 8.82, 'duration': 0.25, 'prosody hierarchy': '#2'}, {'character': '跑', 'pinyin': 'pao2', 'highest pitch': 9.44, 'lowest pitch': 7.82, 'duration': 0.18, 'prosody hierarchy': 'null'}, {'character': '两', 'pinyin': 'liang3', 'highest pitch': 9.91, 'lowest pitch': 5.16, 'duration': 0.25, 'prosody hierarchy': 'null'}, {'character': '次', 'pinyin': 'cii4', 'highest pitch': 10.97, 'lowest pitch': 10.78, 'duration': 0.14, 'prosody hierarchy': '#1'}, {'character': '马', 'pinyin': 'ma3', 'highest pitch': 10.78, 'lowest pitch': 5.5, 'duration': 0.17, 'prosody hierarchy': 'null'}, {'character': '拉', 'pinyin': 'la1', 'highest pitch': 6.07, 'lowest pitch': 5.35, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '松', 'pinyin': 'song1', 'highest pitch': 7.87, 'lowest pitch': 6.07, 'duration': 0.31, 'prosody hierarchy': '#4'}]