这辆自行车怎么会这么容易就折断了？
也有可能是更换的钢架质量未达标。[{'character': '也', 'pinyin': 'ie3', 'highest pitch': 8.91, 'lowest pitch': 8.56, 'duration': 0.15, 'prosody hierarchy': 'null'}, {'character': '有', 'pinyin': 'iou2', 'highest pitch': 10.84, 'lowest pitch': 8.47, 'duration': 0.17, 'prosody hierarchy': '#1'}, {'character': '可', 'pinyin': 'ke3', 'highest pitch': 10.28, 'lowest pitch': 7.94, 'duration': 0.16, 'prosody hierarchy': 'null'}, {'character': '能', 'pinyin': 'neng2', 'highest pitch': 7.94, 'lowest pitch': 6.83, 'duration': 0.22, 'prosody hierarchy': 'null'}, {'character': '是', 'pinyin': 'shiii4', 'highest pitch': 8.37, 'lowest pitch': 6.81, 'duration': 0.21, 'prosody hierarchy': '#1'}, {'character': '更', 'pinyin': 'geng1', 'highest pitch': 9.07, 'lowest pitch': 6.81, 'duration': 0.22, 'prosody hierarchy': 'null'}, {'character': '换', 'pinyin': 'huan4', 'highest pitch': 9.81, 'lowest pitch': 6.72, 'duration': 0.26, 'prosody hierarchy': 'null'}, {'character': '的', 'pinyin': 'de5', 'highest pitch': 6.16, 'lowest pitch': 5.78, 'duration': 0.17, 'prosody hierarchy': '#2'}, {'character': '钢', 'pinyin': 'gang1', 'highest pitch': 10.53, 'lowest pitch': 9.82, 'duration': 0.21, 'prosody hierarchy': 'null'}, {'character': '架', 'pinyin': 'jia4', 'highest pitch': 10.42, 'lowest pitch': 8.79, 'duration': 0.17, 'prosody hierarchy': '#1'}, {'character': '质', 'pinyin': 'zhiii4', 'highest pitch': 9.95, 'lowest pitch': 8.72, 'duration': 0.17, 'prosody hierarchy': 'null'}, {'character': '量', 'pinyin': 'liang4', 'highest pitch': 8.72, 'lowest pitch': 4.97, 'duration': 0.19, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.1}, {'character': '未', 'pinyin': 'uei4', 'highest pitch': 7.68, 'lowest pitch': 6.03, 'duration': 0.12, 'prosody hierarchy': 'null'}, {'character': '达', 'pinyin': 'da2', 'highest pitch': 5.68, 'lowest pitch': 4.9, 'duration': 0.17, 'prosody hierarchy': 'null'}, {'character': '标', 'pinyin': 'biao1', 'highest pitch': 8.43, 'lowest pitch': 7.68, 'duration': 0.26, 'prosody hierarchy': '#4'}]