这项清淤工程将耗时多久？
初步估计，这项清淤工程需要挖掘上百万方淤泥。[{'character': '初', 'pinyin': 'chu1', 'highest pitch': 11.37, 'lowest pitch': 10.44, 'duration': 0.25, 'prosody hierarchy': 'null'}, {'character': '步', 'pinyin': 'bu4', 'highest pitch': 11.24, 'lowest pitch': 7.53, 'duration': 0.17, 'prosody hierarchy': '#1'}, {'character': '估', 'pinyin': 'gu1', 'highest pitch': 8.47, 'lowest pitch': 7.38, 'duration': 0.18, 'prosody hierarchy': 'null'}, {'character': '计', 'pinyin': 'ji4', 'highest pitch': 7.9, 'lowest pitch': 2.07, 'duration': 0.28, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.16}, {'character': '这', 'pinyin': 'zhe4', 'highest pitch': 11.46, 'lowest pitch': 10.68, 'duration': 0.18, 'prosody hierarchy': 'null'}, {'character': '项', 'pinyin': 'xiang4', 'highest pitch': 10.68, 'lowest pitch': 8.28, 'duration': 0.19, 'prosody hierarchy': '#1'}, {'character': '清', 'pinyin': 'qing1', 'highest pitch': 9.12, 'lowest pitch': 8.31, 'duration': 0.18, 'prosody hierarchy': 'null'}, {'character': '淤', 'pinyin': 'v1', 'highest pitch': 8.96, 'lowest pitch': 7.92, 'duration': 0.14, 'prosody hierarchy': '#1'}, {'character': '工', 'pinyin': 'gong1', 'highest pitch': 9.25, 'lowest pitch': 7.92, 'duration': 0.18, 'prosody hierarchy': 'null'}, {'character': '程', 'pinyin': 'cheng2', 'highest pitch': 9.19, 'lowest pitch': 6.31, 'duration': 0.29, 'prosody hierarchy': '#2'}, {'character': '需', 'pinyin': 'xv1', 'highest pitch': 7.85, 'lowest pitch': 7.68, 'duration': 0.18, 'prosody hierarchy': 'null'}, {'character': '要', 'pinyin': 'iao4', 'highest pitch': 7.68, 'lowest pitch': 6.02, 'duration': 0.14, 'prosody hierarchy': '#1'}, {'character': '挖', 'pinyin': 'ua1', 'highest pitch': 7.88, 'lowest pitch': 6.31, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '掘', 'pinyin': 'jve2', 'highest pitch': 7.46, 'lowest pitch': 6.0, 'duration': 0.26, 'prosody hierarchy': '#1'}, {'character': '上', 'pinyin': 'shang4', 'highest pitch': 10.36, 'lowest pitch': 7.34, 'duration': 0.29, 'prosody hierarchy': '#1'}, {'character': '百', 'pinyin': 'bai3', 'highest pitch': 4.11, 'lowest pitch': 3.62, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '万', 'pinyin': 'uan4', 'highest pitch': 10.32, 'lowest pitch': 8.36, 'duration': 0.23, 'prosody hierarchy': 'null'}, {'character': '方', 'pinyin': 'fang1', 'highest pitch': 8.36, 'lowest pitch': 7.19, 'duration': 0.2, 'prosody hierarchy': '#1'}, {'character': '淤', 'pinyin': 'v1', 'highest pitch': 8.96, 'lowest pitch': 7.1, 'duration': 0.15, 'prosody hierarchy': 'null'}, {'character': '泥', 'pinyin': 'ni2', 'highest pitch': 7.3, 'lowest pitch': 5.8, 'duration': 0.34, 'prosody hierarchy': '#4'}]