为什么西方国家怀疑伊朗发展核武器？
西方国家怀疑伊朗以和平利用核能为掩护，试图发展核武器。[{'character': '西', 'pinyin': 'xi1', 'highest pitch': 10.72, 'lowest pitch': 10.04, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '方', 'pinyin': 'fang1', 'highest pitch': 11.33, 'lowest pitch': 9.69, 'duration': 0.21, 'prosody hierarchy': '#1'}, {'character': '国', 'pinyin': 'guo2', 'highest pitch': 9.74, 'lowest pitch': 7.75, 'duration': 0.12, 'prosody hierarchy': 'null'}, {'character': '家', 'pinyin': 'jia1', 'highest pitch': 9.33, 'lowest pitch': 8.92, 'duration': 0.19, 'prosody hierarchy': '#1'}, {'character': '怀', 'pinyin': 'huai2', 'highest pitch': 8.98, 'lowest pitch': 6.77, 'duration': 0.24, 'prosody hierarchy': 'null'}, {'character': '疑', 'pinyin': 'i2', 'highest pitch': 7.77, 'lowest pitch': 6.4, 'duration': 0.28, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.18}, {'character': '伊', 'pinyin': 'i1', 'highest pitch': 9.14, 'lowest pitch': 8.17, 'duration': 0.14, 'prosody hierarchy': 'null'}, {'character': '朗', 'pinyin': 'lang2', 'highest pitch': 8.93, 'lowest pitch': 6.54, 'duration': 0.31, 'prosody hierarchy': '#2'}, {'character': '以', 'pinyin': 'i3', 'highest pitch': 8.53, 'lowest pitch': 5.77, 'duration': 0.19, 'prosody hierarchy': '#1'}, {'character': '和', 'pinyin': 'he2', 'highest pitch': 14.29, 'lowest pitch': 5.9, 'duration': 0.23, 'prosody hierarchy': 'null'}, {'character': '平', 'pinyin': 'ping2', 'highest pitch': 9.25, 'lowest pitch': 8.61, 'duration': 0.19, 'prosody hierarchy': '#1'}, {'character': '利', 'pinyin': 'li4', 'highest pitch': 9.72, 'lowest pitch': 8.79, 'duration': 0.13, 'prosody hierarchy': 'null'}, {'character': '用', 'pinyin': 'iong4', 'highest pitch': 8.79, 'lowest pitch': 7.19, 'duration': 0.17, 'prosody hierarchy': '#1'}, {'character': '核', 'pinyin': 'he2', 'highest pitch': 14.29, 'lowest pitch': 7.56, 'duration': 0.21, 'prosody hierarchy': 'null'}, {'character': '能', 'pinyin': 'neng2', 'highest pitch': 10.06, 'lowest pitch': 8.23, 'duration': 0.21, 'prosody hierarchy': '#1'}, {'character': '为', 'pinyin': 'uei2', 'highest pitch': 8.23, 'lowest pitch': 7.07, 'duration': 0.15, 'prosody hierarchy': '#1'}, {'character': '掩', 'pinyin': 'ian3', 'highest pitch': 7.83, 'lowest pitch': 5.18, 'duration': 0.21, 'prosody hierarchy': 'null'}, {'character': '护', 'pinyin': 'hu4', 'highest pitch': 8.02, 'lowest pitch': 5.69, 'duration': 0.26, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.27}, {'character': '试', 'pinyin': 'shiii4', 'highest pitch': 8.79, 'lowest pitch': 6.86, 'duration': 0.18, 'prosody hierarchy': 'null'}, {'character': '图', 'pinyin': 'tu2', 'highest pitch': 8.39, 'lowest pitch': 6.86, 'duration': 0.16, 'prosody hierarchy': '#1'}, {'character': '发', 'pinyin': 'fa1', 'highest pitch': 9.75, 'lowest pitch': 8.96, 'duration': 0.17, 'prosody hierarchy': 'null'}, {'character': '展', 'pinyin': 'zhan3', 'highest pitch': 9.07, 'lowest pitch': 5.75, 'duration': 0.21, 'prosody hierarchy': '#2'}, {'character': '核', 'pinyin': 'he2', 'highest pitch': 14.29, 'lowest pitch': 5.99, 'duration': 0.24, 'prosody hierarchy': 'null'}, {'character': '武', 'pinyin': 'u3', 'highest pitch': 10.4, 'lowest pitch': 5.51, 'duration': 0.16, 'prosody hierarchy': 'null'}, {'character': '器', 'pinyin': 'qi4', 'highest pitch': 9.85, 'lowest pitch': 6.62, 'duration': 0.31, 'prosody hierarchy': '#4'}]