translation.en: So you could really say that researchers trying to understand the cause of disease without being able to have human stem cell models were much like investigators trying to figure out what had gone terribly wrong in a plane crash without having a black box, or a flight recorder.
translation.zh: 所以真的可以说， 研究人员试图理解疾病起因、 却没有人类干细胞模型， 就像是调查人员试图查明 坠机事故原因、 却找不到黑匣子或飞行记录仪，