这是什么东西？
图为榫卯石构件。[{'character': '图', 'pinyin': 'tu2', 'highest pitch': 10.39, 'lowest pitch': 9.28, 'duration': 0.26, 'prosody hierarchy': 'null'}, {'character': '为', 'pinyin': 'uei2', 'highest pitch': 10.31, 'lowest pitch': 8.27, 'duration': 0.25, 'prosody hierarchy': '#2'}, {'character': '榫', 'pinyin': 'suen2', 'highest pitch': 10.17, 'lowest pitch': 7.8, 'duration': 0.25, 'prosody hierarchy': 'null'}, {'character': '卯', 'pinyin': 'mao3', 'highest pitch': 11.37, 'lowest pitch': 6.34, 'duration': 0.23, 'prosody hierarchy': 'null'}, {'character': '石', 'pinyin': 'shiii2', 'highest pitch': 7.59, 'lowest pitch': 6.84, 'duration': 0.19, 'prosody hierarchy': '#1'}, {'character': '构', 'pinyin': 'gou4', 'highest pitch': 9.43, 'lowest pitch': 7.59, 'duration': 0.17, 'prosody hierarchy': 'null'}, {'character': '件', 'pinyin': 'jian4', 'highest pitch': 10.24, 'lowest pitch': 5.88, 'duration': 0.27, 'prosody hierarchy': '#4'}]