1997年,美国儿科协会出台了关于母乳喂养和母乳使用问题的政策声明,宣称母乳带有“物种特异性”(species-specific),推荐将母乳作为初生儿前六个月的唯一食品,然后可以将母乳与适量的固体食品混合,直到婴儿长到一周岁。
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Chromosome is the material carrier of biological heredity, and displays the highstability and the species specificity in the biology during the generations.
染色体是生物遗传的物质载体,在生物的世代相传过程中表现出高度的稳定性和物种特异性。
参考来源 - 小鼠4、8·2,447,543篇论文数据,部分数据来源于NoteExpress
树皮的图案以及纹理具有物种特异性。
The texture and patterning of the bark is often characteristic of the species.
禽流感病毒具有高度物种特异性,但偶尔也跨越物种屏障,感染人类。
Avian influenza viruses are highly species-specific, but have, on rare occasions, crossed the species barrier to infect humans.
古人主要将嫁接技法应用在缩短生产周期,保持物种特异性状和扩大繁殖系数上;
Ancient people used it to shorten productive cycle, keep special character of species and expand reproduce coefficient.
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