我也担心铁路的安全问题。
如果真是沉了就拆，修了又沉，这铁路能不能保证安全呀？[{'character': '如', 'pinyin': 'ru2', 'highest pitch': 9.78, 'lowest pitch': 8.41, 'duration': 0.16, 'prosody hierarchy': 'null'}, {'character': '果', 'pinyin': 'guo3', 'highest pitch': 9.93, 'lowest pitch': 6.74, 'duration': 0.17, 'prosody hierarchy': '#1'}, {'character': '真', 'pinyin': 'zhen1', 'highest pitch': 10.44, 'lowest pitch': 9.9, 'duration': 0.22, 'prosody hierarchy': 'null'}, {'character': '是', 'pinyin': 'shiii4', 'highest pitch': 10.1, 'lowest pitch': 7.42, 'duration': 0.25, 'prosody hierarchy': '#2'}, {'character': '沉', 'pinyin': 'chen2', 'highest pitch': 8.55, 'lowest pitch': 6.33, 'duration': 0.23, 'prosody hierarchy': 'null'}, {'character': '了', 'pinyin': 'le5', 'highest pitch': 10.63, 'lowest pitch': 8.55, 'duration': 0.13, 'prosody hierarchy': '#1'}, {'character': '就', 'pinyin': 'jiou4', 'highest pitch': 9.37, 'lowest pitch': 6.45, 'duration': 0.18, 'prosody hierarchy': 'null'}, {'character': '拆', 'pinyin': 'chai1', 'highest pitch': 9.02, 'lowest pitch': 6.49, 'duration': 0.35, 'prosody hierarchy': '#2'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.04}, {'character': '修', 'pinyin': 'xiou1', 'highest pitch': 11.01, 'lowest pitch': 10.63, 'duration': 0.23, 'prosody hierarchy': 'null'}, {'character': '了', 'pinyin': 'le5', 'highest pitch': 10.63, 'lowest pitch': 9.16, 'duration': 0.11, 'prosody hierarchy': '#1'}, {'character': '又', 'pinyin': 'iou4', 'highest pitch': 9.16, 'lowest pitch': 7.39, 'duration': 0.17, 'prosody hierarchy': 'null'}, {'character': '沉', 'pinyin': 'chen2', 'highest pitch': 8.55, 'lowest pitch': 5.25, 'duration': 0.35, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.36}, {'character': '这', 'pinyin': 'zhe4', 'highest pitch': 8.99, 'lowest pitch': 7.25, 'duration': 0.18, 'prosody hierarchy': '#1'}, {'character': '铁', 'pinyin': 'tie3', 'highest pitch': 8.06, 'lowest pitch': 5.45, 'duration': 0.21, 'prosody hierarchy': 'null'}, {'character': '路', 'pinyin': 'lu4', 'highest pitch': 7.81, 'lowest pitch': 5.5, 'duration': 0.26, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.12}, {'character': '能', 'pinyin': 'neng2', 'highest pitch': 10.7, 'lowest pitch': 6.91, 'duration': 0.18, 'prosody hierarchy': 'null'}, {'character': '不', 'pinyin': 'bu4', 'highest pitch': 11.29, 'lowest pitch': 9.5, 'duration': 0.09, 'prosody hierarchy': 'null'}, {'character': '能', 'pinyin': 'neng2', 'highest pitch': 10.7, 'lowest pitch': 8.36, 'duration': 0.2, 'prosody hierarchy': '#1'}, {'character': '保', 'pinyin': 'bao3', 'highest pitch': 8.43, 'lowest pitch': 5.53, 'duration': 0.17, 'prosody hierarchy': 'null'}, {'character': '证', 'pinyin': 'zheng4', 'highest pitch': 7.04, 'lowest pitch': 5.63, 'duration': 0.15, 'prosody hierarchy': '#1'}, {'character': '安', 'pinyin': 'an1', 'highest pitch': 8.25, 'lowest pitch': 7.51, 'duration': 0.18, 'prosody hierarchy': 'null'}, {'character': '全', 'pinyin': 'qvan2', 'highest pitch': 8.18, 'lowest pitch': 5.19, 'duration': 0.25, 'prosody hierarchy': 'null'}, {'character': '呀', 'pinyin': 'ia5', 'highest pitch': 6.03, 'lowest pitch': 5.39, 'duration': 0.28, 'prosody hierarchy': '#4'}]