We delayed the start of our experiments in 1999 until we completed a year-and-a-half bioethical review as to whether we should try and make an artificial species.

• 我们推迟了1999年开始的实验，直到对是否应该尝试制造人工物种这一问题做了长达一年半的生物伦理学讨论之后，实验才继续进行。