南广高铁的建设进展迅速。
这一幕幕宣告南广高铁迎来上砟上枕的施工高潮。[{'character': '这', 'pinyin': 'zhe4', 'highest pitch': 11.03, 'lowest pitch': 8.84, 'duration': 0.22, 'prosody hierarchy': '#1'}, {'character': '一', 'pinyin': 'i2', 'highest pitch': 9.61, 'lowest pitch': 8.13, 'duration': 0.13, 'prosody hierarchy': 'null'}, {'character': '幕', 'pinyin': 'mu4', 'highest pitch': 11.23, 'lowest pitch': 9.61, 'duration': 0.17, 'prosody hierarchy': 'null'}, {'character': '幕', 'pinyin': 'mu4', 'highest pitch': 11.23, 'lowest pitch': 8.08, 'duration': 0.27, 'prosody hierarchy': '#2'}, {'character': '宣', 'pinyin': 'xvan1', 'highest pitch': 9.3, 'lowest pitch': 7.85, 'duration': 0.26, 'prosody hierarchy': 'null'}, {'character': '告', 'pinyin': 'gao4', 'highest pitch': 8.89, 'lowest pitch': 7.56, 'duration': 0.18, 'prosody hierarchy': '#1'}, {'character': '南', 'pinyin': 'nan2', 'highest pitch': 9.71, 'lowest pitch': 6.93, 'duration': 0.21, 'prosody hierarchy': 'null'}, {'character': '广', 'pinyin': 'guang3', 'highest pitch': 10.34, 'lowest pitch': 5.8, 'duration': 0.17, 'prosody hierarchy': '#1'}, {'character': '高', 'pinyin': 'gao1', 'highest pitch': 9.44, 'lowest pitch': 5.93, 'duration': 0.18, 'prosody hierarchy': 'null'}, {'character': '铁', 'pinyin': 'tie3', 'highest pitch': 8.13, 'lowest pitch': 4.36, 'duration': 0.35, 'prosody hierarchy': '#2'}, {'character': '迎', 'pinyin': 'ing2', 'highest pitch': 8.38, 'lowest pitch': 6.99, 'duration': 0.17, 'prosody hierarchy': 'null'}, {'character': '来', 'pinyin': 'lai2', 'highest pitch': 8.5, 'lowest pitch': 6.14, 'duration': 0.25, 'prosody hierarchy': '#2'}, {'character': '上', 'pinyin': 'shang4', 'highest pitch': 11.33, 'lowest pitch': 8.17, 'duration': 0.28, 'prosody hierarchy': 'null'}, {'character': '砟', 'pinyin': 'zha3', 'highest pitch': 8.71, 'lowest pitch': 5.06, 'duration': 0.22, 'prosody hierarchy': '#1'}, {'character': '上', 'pinyin': 'shang4', 'highest pitch': 11.33, 'lowest pitch': 8.04, 'duration': 0.22, 'prosody hierarchy': 'null'}, {'character': '枕', 'pinyin': 'zhen3', 'highest pitch': 8.04, 'lowest pitch': 4.95, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '的', 'pinyin': 'de5', 'highest pitch': 6.1, 'lowest pitch': 5.43, 'duration': 0.1, 'prosody hierarchy': '#1'}, {'character': '施', 'pinyin': 'shiii1', 'highest pitch': 8.2, 'lowest pitch': 7.06, 'duration': 0.18, 'prosody hierarchy': 'null'}, {'character': '工', 'pinyin': 'gong1', 'highest pitch': 8.55, 'lowest pitch': 8.24, 'duration': 0.15, 'prosody hierarchy': '#1'}, {'character': '高', 'pinyin': 'gao1', 'highest pitch': 9.44, 'lowest pitch': 8.24, 'duration': 0.17, 'prosody hierarchy': 'null'}, {'character': '潮', 'pinyin': 'chao2', 'highest pitch': 9.25, 'lowest pitch': 5.9, 'duration': 0.35, 'prosody hierarchy': '#4'}]