臭氧层

His picture of "order for free" suggested to him a fairly far-out idea: that some of the differentiation each egg underwent was inevitable, no matter what genes you started out with!

无来由的秩序的画面让他有了一个简直是妙不可言的想法：每个卵经历分化是必然的，不管从什么基因开始！

Oral thrush in infants is common and is usually not associated with other disease.

口腔鹅口疮是婴幼儿常见的是通常不与其他相关的疾病。