这次回购行动是否取得了预期的效果呢？
圆明园猪首铜像的捐款回购便是一成功案例。[{'character': '圆', 'pinyin': 'van2', 'highest pitch': 10.08, 'lowest pitch': 8.78, 'duration': 0.16, 'prosody hierarchy': 'null'}, {'character': '明', 'pinyin': 'ming2', 'highest pitch': 10.24, 'lowest pitch': 9.68, 'duration': 0.18, 'prosody hierarchy': 'null'}, {'character': '园', 'pinyin': 'van2', 'highest pitch': 10.08, 'lowest pitch': 7.55, 'duration': 0.27, 'prosody hierarchy': '#2'}, {'character': '猪', 'pinyin': 'zhu1', 'highest pitch': 11.29, 'lowest pitch': 9.07, 'duration': 0.17, 'prosody hierarchy': 'null'}, {'character': '首', 'pinyin': 'shou3', 'highest pitch': 11.06, 'lowest pitch': 6.22, 'duration': 0.19, 'prosody hierarchy': '#1'}, {'character': '铜', 'pinyin': 'tong2', 'highest pitch': 7.57, 'lowest pitch': 6.22, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '像', 'pinyin': 'xiang4', 'highest pitch': 9.51, 'lowest pitch': 7.44, 'duration': 0.15, 'prosody hierarchy': 'null'}, {'character': '的', 'pinyin': 'de5', 'highest pitch': 7.47, 'lowest pitch': 6.67, 'duration': 0.09, 'prosody hierarchy': '#1'}, {'character': '捐', 'pinyin': 'jvan1', 'highest pitch': 9.88, 'lowest pitch': 6.67, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '款', 'pinyin': 'kuan3', 'highest pitch': 9.84, 'lowest pitch': 5.65, 'duration': 0.22, 'prosody hierarchy': '#1'}, {'character': '回', 'pinyin': 'huei2', 'highest pitch': 6.02, 'lowest pitch': 5.69, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '购', 'pinyin': 'gou4', 'highest pitch': 10.0, 'lowest pitch': 6.02, 'duration': 0.24, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.1}, {'character': '便', 'pinyin': 'bian4', 'highest pitch': 9.26, 'lowest pitch': 7.62, 'duration': 0.17, 'prosody hierarchy': 'null'}, {'character': '是', 'pinyin': 'shiii4', 'highest pitch': 7.68, 'lowest pitch': 6.86, 'duration': 0.15, 'prosody hierarchy': '#1'}, {'character': '一', 'pinyin': 'i4', 'highest pitch': 6.86, 'lowest pitch': 6.36, 'duration': 0.12, 'prosody hierarchy': 'null'}, {'character': '成', 'pinyin': 'cheng2', 'highest pitch': 7.32, 'lowest pitch': 6.19, 'duration': 0.24, 'prosody hierarchy': 'null'}, {'character': '功', 'pinyin': 'gong1', 'highest pitch': 8.9, 'lowest pitch': 6.91, 'duration': 0.14, 'prosody hierarchy': '#1'}, {'character': '案', 'pinyin': 'an4', 'highest pitch': 9.52, 'lowest pitch': 8.25, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '例', 'pinyin': 'li4', 'highest pitch': 8.79, 'lowest pitch': 6.29, 'duration': 0.27, 'prosody hierarchy': '#4'}]