欧盟的关卡是我们最需要克服的。
这其中，以欧盟的关卡最为关键和艰难。[{'character': '这', 'pinyin': 'zhe4', 'highest pitch': 10.52, 'lowest pitch': 10.08, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '其', 'pinyin': 'qi2', 'highest pitch': 9.17, 'lowest pitch': 7.97, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '中', 'pinyin': 'zhong1', 'highest pitch': 9.94, 'lowest pitch': 7.97, 'duration': 0.27, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.2}, {'character': '以', 'pinyin': 'i3', 'highest pitch': 14.27, 'lowest pitch': 6.45, 'duration': 0.17, 'prosody hierarchy': '#1'}, {'character': '欧', 'pinyin': 'ou1', 'highest pitch': 14.0, 'lowest pitch': 10.29, 'duration': 0.17, 'prosody hierarchy': 'null'}, {'character': '盟', 'pinyin': 'meng2', 'highest pitch': 10.83, 'lowest pitch': 7.48, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '的', 'pinyin': 'de5', 'highest pitch': 8.54, 'lowest pitch': 7.76, 'duration': 0.11, 'prosody hierarchy': '#1'}, {'character': '关', 'pinyin': 'guan1', 'highest pitch': 9.15, 'lowest pitch': 7.76, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '卡', 'pinyin': 'qia3', 'highest pitch': 9.11, 'lowest pitch': 4.57, 'duration': 0.25, 'prosody hierarchy': '#1'}, {'character': '最', 'pinyin': 'zuei4', 'highest pitch': 7.68, 'lowest pitch': 6.37, 'duration': 0.16, 'prosody hierarchy': 'null'}, {'character': '为', 'pinyin': 'uei2', 'highest pitch': 6.44, 'lowest pitch': 6.25, 'duration': 0.15, 'prosody hierarchy': '#1'}, {'character': '关', 'pinyin': 'guan1', 'highest pitch': 9.15, 'lowest pitch': 6.44, 'duration': 0.21, 'prosody hierarchy': 'null'}, {'character': '键', 'pinyin': 'jian4', 'highest pitch': 8.77, 'lowest pitch': 6.57, 'duration': 0.2, 'prosody hierarchy': '#1'}, {'character': '和', 'pinyin': 'he2', 'highest pitch': 14.46, 'lowest pitch': 5.99, 'duration': 0.17, 'prosody hierarchy': '#1'}, {'character': '艰', 'pinyin': 'jian1', 'highest pitch': 7.83, 'lowest pitch': 5.99, 'duration': 0.22, 'prosody hierarchy': 'null'}, {'character': '难', 'pinyin': 'nan2', 'highest pitch': 7.75, 'lowest pitch': 5.57, 'duration': 0.34, 'prosody hierarchy': '#4'}]