Sometimes, the limits of using a single reference have direct medical consequences.

有时，使用单一参考的限制会产生直接的医疗后果。

Scientists describe it as a rainbow of genomes, compared with one line representing the older, single reference genome.

科学家将其描述为基因组中的彩虹，而较老的、单一的参考基因组就用一条线代表。

I have 2,600 comic books in there. I challenge you to find a single reference to Kryptonian skin cells. Challenge accepted.

我那儿有2600本连环画册，你敢不敢去找出所谓的“氪星人皮肤细胞”的内容？接受挑战。

To find a single reference to kryptonian skin cells.

你找不到任何有关氪星球皮肤细胞的线索。

Some of these applicants have never held down a job before and don't have a single reference.

其中一些申请人以前从未担任过工作，也没有任何推荐信。

One study, published in 2015, found that, because many gene-sequencing technologies are not perfectly accurate, comparing readouts from the region with the single reference genome led to mistakes around 20% of the time.

2015年发表的一项研究发现，由于许多基因测序技术并不完全准确，将一个区域的读数与单个参考基因组的读数进行比较会导致20%左右的误差。

Well, novels are fascinating, because there's a difference between novels in the 18th Century, when they first came into being, and novels in the 19th Century-in the 18th Century something like Robinson Crusoe, there's not a single reference to loneliness.

嗯，小说很迷人，因为18世纪刚刚出现的小说和19世纪的小说有所不同——在18世纪的作品中，例如《鲁滨逊漂流记》，里面一次都没有提及孤单一词。