我们需要再练习一次。
上述演练步骤共进行了两次。[{'character': '上', 'pinyin': 'shang4', 'highest pitch': 11.4, 'lowest pitch': 10.51, 'duration': 0.25, 'prosody hierarchy': 'null'}, {'character': '述', 'pinyin': 'shu4', 'highest pitch': 10.51, 'lowest pitch': 8.72, 'duration': 0.19, 'prosody hierarchy': '#1'}, {'character': '演', 'pinyin': 'ian3', 'highest pitch': 8.72, 'lowest pitch': 5.89, 'duration': 0.16, 'prosody hierarchy': 'null'}, {'character': '练', 'pinyin': 'lian4', 'highest pitch': 7.65, 'lowest pitch': 5.97, 'duration': 0.2, 'prosody hierarchy': '#1'}, {'character': '步', 'pinyin': 'bu4', 'highest pitch': 9.34, 'lowest pitch': 7.35, 'duration': 0.17, 'prosody hierarchy': 'null'}, {'character': '骤', 'pinyin': 'zhou4', 'highest pitch': 8.74, 'lowest pitch': 6.76, 'duration': 0.29, 'prosody hierarchy': '#2'}, {'character': '共', 'pinyin': 'gong4', 'highest pitch': 9.18, 'lowest pitch': 8.07, 'duration': 0.2, 'prosody hierarchy': '#1'}, {'character': '进', 'pinyin': 'jin4', 'highest pitch': 8.83, 'lowest pitch': 7.91, 'duration': 0.16, 'prosody hierarchy': 'null'}, {'character': '行', 'pinyin': 'xing2', 'highest pitch': 7.91, 'lowest pitch': 6.91, 'duration': 0.15, 'prosody hierarchy': 'null'}, {'character': '了', 'pinyin': 'le5', 'highest pitch': 8.65, 'lowest pitch': 7.18, 'duration': 0.1, 'prosody hierarchy': '#1'}, {'character': '两', 'pinyin': 'liang3', 'highest pitch': 8.75, 'lowest pitch': 3.96, 'duration': 0.26, 'prosody hierarchy': 'null'}, {'character': '次', 'pinyin': 'cii4', 'highest pitch': 9.85, 'lowest pitch': 6.58, 'duration': 0.32, 'prosody hierarchy': '#4'}]