我们应该准备好应对这个挑战。
这恐怕是国际航空业必须认真面对的严峻现实。[{'character': '这', 'pinyin': 'zhe4', 'highest pitch': 9.72, 'lowest pitch': 7.95, 'duration': 0.18, 'prosody hierarchy': '#1'}, {'character': '恐', 'pinyin': 'kong3', 'highest pitch': 8.28, 'lowest pitch': 6.35, 'duration': 0.22, 'prosody hierarchy': 'null'}, {'character': '怕', 'pinyin': 'pa4', 'highest pitch': 8.22, 'lowest pitch': 6.46, 'duration': 0.21, 'prosody hierarchy': '#1'}, {'character': '是', 'pinyin': 'shiii4', 'highest pitch': 7.56, 'lowest pitch': 6.22, 'duration': 0.23, 'prosody hierarchy': '#2'}, {'character': '国', 'pinyin': 'guo2', 'highest pitch': 8.5, 'lowest pitch': 6.25, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '际', 'pinyin': 'ji4', 'highest pitch': 10.0, 'lowest pitch': 8.5, 'duration': 0.16, 'prosody hierarchy': '#1'}, {'character': '航', 'pinyin': 'hang2', 'highest pitch': 8.82, 'lowest pitch': 6.78, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '空', 'pinyin': 'kong1', 'highest pitch': 8.74, 'lowest pitch': 7.11, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '业', 'pinyin': 'ie4', 'highest pitch': 13.43, 'lowest pitch': 7.5, 'duration': 0.21, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.06}, {'character': '必', 'pinyin': 'bi4', 'highest pitch': 9.32, 'lowest pitch': 8.04, 'duration': 0.17, 'prosody hierarchy': 'null'}, {'character': '须', 'pinyin': 'xv1', 'highest pitch': 9.63, 'lowest pitch': 8.04, 'duration': 0.23, 'prosody hierarchy': '#1'}, {'character': '认', 'pinyin': 'ren4', 'highest pitch': 10.1, 'lowest pitch': 8.34, 'duration': 0.17, 'prosody hierarchy': 'null'}, {'character': '真', 'pinyin': 'zhen1', 'highest pitch': 10.0, 'lowest pitch': 8.34, 'duration': 0.16, 'prosody hierarchy': '#1'}, {'character': '面', 'pinyin': 'mian4', 'highest pitch': 10.26, 'lowest pitch': 8.02, 'duration': 0.22, 'prosody hierarchy': 'null'}, {'character': '对', 'pinyin': 'duei4', 'highest pitch': 8.82, 'lowest pitch': 6.62, 'duration': 0.15, 'prosody hierarchy': 'null'}, {'character': '的', 'pinyin': 'de5', 'highest pitch': 7.11, 'lowest pitch': 5.84, 'duration': 0.1, 'prosody hierarchy': '#1'}, {'character': '严', 'pinyin': 'ian2', 'highest pitch': 7.01, 'lowest pitch': 5.1, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '峻', 'pinyin': 'jvn4', 'highest pitch': 10.47, 'lowest pitch': 7.01, 'duration': 0.18, 'prosody hierarchy': '#1'}, {'character': '现', 'pinyin': 'xian4', 'highest pitch': 9.29, 'lowest pitch': 6.45, 'duration': 0.22, 'prosody hierarchy': 'null'}, {'character': '实', 'pinyin': 'shiii2', 'highest pitch': 6.45, 'lowest pitch': 5.41, 'duration': 0.32, 'prosody hierarchy': '#4'}]