我们应该注意安全。
远离铁轨和金属栏杆等金属物。[{'character': '远', 'pinyin': 'van3', 'highest pitch': 9.0, 'lowest pitch': 8.27, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '离', 'pinyin': 'li2', 'highest pitch': 9.42, 'lowest pitch': 8.02, 'duration': 0.23, 'prosody hierarchy': '#2'}, {'character': '铁', 'pinyin': 'tie2', 'highest pitch': 10.87, 'lowest pitch': 8.08, 'duration': 0.28, 'prosody hierarchy': 'null'}, {'character': '轨', 'pinyin': 'guei3', 'highest pitch': 9.86, 'lowest pitch': 5.23, 'duration': 0.25, 'prosody hierarchy': '#2'}, {'character': '和', 'pinyin': 'he2', 'highest pitch': 7.51, 'lowest pitch': 5.99, 'duration': 0.22, 'prosody hierarchy': '#1'}, {'character': '金', 'pinyin': 'jin1', 'highest pitch': 10.94, 'lowest pitch': 7.32, 'duration': 0.18, 'prosody hierarchy': 'null'}, {'character': '属', 'pinyin': 'shu3', 'highest pitch': 10.55, 'lowest pitch': 6.48, 'duration': 0.14, 'prosody hierarchy': '#1'}, {'character': '栏', 'pinyin': 'lan2', 'highest pitch': 6.8, 'lowest pitch': 5.1, 'duration': 0.21, 'prosody hierarchy': 'null'}, {'character': '杆', 'pinyin': 'gan1', 'highest pitch': 10.28, 'lowest pitch': 6.8, 'duration': 0.23, 'prosody hierarchy': '#2'}, {'character': '等', 'pinyin': 'deng3', 'highest pitch': 9.32, 'lowest pitch': 5.56, 'duration': 0.19, 'prosody hierarchy': '#1'}, {'character': '金', 'pinyin': 'jin1', 'highest pitch': 10.94, 'lowest pitch': 5.67, 'duration': 0.18, 'prosody hierarchy': 'null'}, {'character': '属', 'pinyin': 'shu3', 'highest pitch': 10.55, 'lowest pitch': 4.89, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '物', 'pinyin': 'u4', 'highest pitch': 11.72, 'lowest pitch': 5.17, 'duration': 0.26, 'prosody hierarchy': '#4'}]