我们需要定期进行飞行训练。
主要目标在维持飞行组员的熟练度。[{'character': '主', 'pinyin': 'zhu3', 'highest pitch': 8.46, 'lowest pitch': 7.64, 'duration': 0.18, 'prosody hierarchy': 'null'}, {'character': '要', 'pinyin': 'iao4', 'highest pitch': 10.85, 'lowest pitch': 8.19, 'duration': 0.18, 'prosody hierarchy': '#1'}, {'character': '目', 'pinyin': 'mu4', 'highest pitch': 10.18, 'lowest pitch': 8.14, 'duration': 0.22, 'prosody hierarchy': 'null'}, {'character': '标', 'pinyin': 'biao1', 'highest pitch': 9.22, 'lowest pitch': 8.79, 'duration': 0.28, 'prosody hierarchy': '#3'}, {'character': '在', 'pinyin': 'zai4', 'highest pitch': 9.46, 'lowest pitch': 7.48, 'duration': 0.2, 'prosody hierarchy': '#1'}, {'character': '维', 'pinyin': 'uei2', 'highest pitch': 8.49, 'lowest pitch': 7.08, 'duration': 0.18, 'prosody hierarchy': 'null'}, {'character': '持', 'pinyin': 'chiii2', 'highest pitch': 8.1, 'lowest pitch': 7.09, 'duration': 0.29, 'prosody hierarchy': '#2'}, {'character': '飞', 'pinyin': 'fei1', 'highest pitch': 10.53, 'lowest pitch': 7.98, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '行', 'pinyin': 'xing2', 'highest pitch': 10.0, 'lowest pitch': 7.81, 'duration': 0.21, 'prosody hierarchy': '#1'}, {'character': '组', 'pinyin': 'zu3', 'highest pitch': 9.09, 'lowest pitch': 4.97, 'duration': 0.15, 'prosody hierarchy': 'null'}, {'character': '员', 'pinyin': 'van2', 'highest pitch': 7.16, 'lowest pitch': 4.97, 'duration': 0.16, 'prosody hierarchy': 'null'}, {'character': '的', 'pinyin': 'de5', 'highest pitch': 8.11, 'lowest pitch': 7.16, 'duration': 0.07, 'prosody hierarchy': '#1'}, {'character': '熟', 'pinyin': 'shu2', 'highest pitch': 7.66, 'lowest pitch': 6.55, 'duration': 0.18, 'prosody hierarchy': 'null'}, {'character': '练', 'pinyin': 'lian4', 'highest pitch': 9.58, 'lowest pitch': 7.21, 'duration': 0.21, 'prosody hierarchy': 'null'}, {'character': '度', 'pinyin': 'du4', 'highest pitch': 10.13, 'lowest pitch': 7.19, 'duration': 0.23, 'prosody hierarchy': '#4'}]