translation.en: Well some researchers lost heart, concluding that was so many candidate shapes for the extra dimensions, each giving rise to different physical features, string theory would never make definitive, testable predictions.
translation.zh: 有些研究人员失去信心， 结论是额外维度有这么多的候选形状， 每一个都有不同的物理特征， 弦理论永远不会做出 确定的，可检验的预测。