真的吗？这太神奇了！
先前，已经有研究人员成功地用胚胎干细胞“造”出精子。[{'character': '先', 'pinyin': 'xian1', 'highest pitch': 10.95, 'lowest pitch': 10.59, 'duration': 0.26, 'prosody hierarchy': 'null'}, {'character': '前', 'pinyin': 'qian2', 'highest pitch': 10.83, 'lowest pitch': 7.27, 'duration': 0.34, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.12}, {'character': '已', 'pinyin': 'i3', 'highest pitch': 7.82, 'lowest pitch': 6.38, 'duration': 0.13, 'prosody hierarchy': 'null'}, {'character': '经', 'pinyin': 'jing1', 'highest pitch': 10.78, 'lowest pitch': 6.38, 'duration': 0.17, 'prosody hierarchy': '#1'}, {'character': '有', 'pinyin': 'iou3', 'highest pitch': 10.68, 'lowest pitch': 6.74, 'duration': 0.17, 'prosody hierarchy': '#1'}, {'character': '研', 'pinyin': 'ian2', 'highest pitch': 7.16, 'lowest pitch': 6.41, 'duration': 0.16, 'prosody hierarchy': 'null'}, {'character': '究', 'pinyin': 'jiou1', 'highest pitch': 8.03, 'lowest pitch': 7.16, 'duration': 0.14, 'prosody hierarchy': '#1'}, {'character': '人', 'pinyin': 'ren2', 'highest pitch': 7.63, 'lowest pitch': 6.85, 'duration': 0.17, 'prosody hierarchy': 'null'}, {'character': '员', 'pinyin': 'van2', 'highest pitch': 7.63, 'lowest pitch': 6.35, 'duration': 0.27, 'prosody hierarchy': '#2'}, {'character': '成', 'pinyin': 'cheng2', 'highest pitch': 8.36, 'lowest pitch': 6.85, 'duration': 0.28, 'prosody hierarchy': 'null'}, {'character': '功', 'pinyin': 'gong1', 'highest pitch': 9.2, 'lowest pitch': 7.88, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '地', 'pinyin': 'de5', 'highest pitch': 8.97, 'lowest pitch': 6.9, 'duration': 0.2, 'prosody hierarchy': '#1'}, {'character': '用', 'pinyin': 'iong4', 'highest pitch': 8.31, 'lowest pitch': 6.9, 'duration': 0.22, 'prosody hierarchy': '#1'}, {'character': '胚', 'pinyin': 'pei1', 'highest pitch': 9.32, 'lowest pitch': 7.42, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '胎', 'pinyin': 'tai1', 'highest pitch': 9.69, 'lowest pitch': 9.27, 'duration': 0.16, 'prosody hierarchy': '#1'}, {'character': '干', 'pinyin': 'gan4', 'highest pitch': 10.34, 'lowest pitch': 8.24, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '细', 'pinyin': 'xi4', 'highest pitch': 8.24, 'lowest pitch': 6.84, 'duration': 0.18, 'prosody hierarchy': 'null'}, {'character': '胞', 'pinyin': 'bao1', 'highest pitch': 9.32, 'lowest pitch': 6.87, 'duration': 0.21, 'prosody hierarchy': '#1'}, {'character': '造', 'pinyin': 'zao4', 'highest pitch': 9.81, 'lowest pitch': 7.7, 'duration': 0.22, 'prosody hierarchy': 'null'}, {'character': '出', 'pinyin': 'chu1', 'highest pitch': 9.3, 'lowest pitch': 7.7, 'duration': 0.17, 'prosody hierarchy': '#1'}, {'character': '精', 'pinyin': 'jing1', 'highest pitch': 10.78, 'lowest pitch': 8.24, 'duration': 0.22, 'prosody hierarchy': 'null'}, {'character': '子', 'pinyin': 'zii3', 'highest pitch': 13.45, 'lowest pitch': 4.6, 'duration': 0.28, 'prosody hierarchy': '#4'}]