这是个什么东西？
带钻孔的鸵鸟蛋壳。[{'character': '带', 'pinyin': 'dai4', 'highest pitch': 10.75, 'lowest pitch': 8.38, 'duration': 0.21, 'prosody hierarchy': '#1'}, {'character': '钻', 'pinyin': 'zuan1', 'highest pitch': 10.99, 'lowest pitch': 8.38, 'duration': 0.23, 'prosody hierarchy': 'null'}, {'character': '孔', 'pinyin': 'kong3', 'highest pitch': 10.73, 'lowest pitch': 5.11, 'duration': 0.25, 'prosody hierarchy': 'null'}, {'character': '的', 'pinyin': 'de5', 'highest pitch': 5.92, 'lowest pitch': 5.11, 'duration': 0.15, 'prosody hierarchy': '#2'}, {'character': '鸵', 'pinyin': 'tuo2', 'highest pitch': 7.68, 'lowest pitch': 5.47, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '鸟', 'pinyin': 'niao3', 'highest pitch': 8.19, 'lowest pitch': 5.31, 'duration': 0.17, 'prosody hierarchy': '#1'}, {'character': '蛋', 'pinyin': 'dan4', 'highest pitch': 7.85, 'lowest pitch': 5.87, 'duration': 0.21, 'prosody hierarchy': 'null'}, {'character': '壳', 'pinyin': 'ke2', 'highest pitch': 7.49, 'lowest pitch': 6.1, 'duration': 0.35, 'prosody hierarchy': '#4'}]