Please explain the following excerpt
问题描述：
Please explain the following excerpt
This technique has revolutionized genetic research because minute amounts of DNA not previously amenable to analysis can be amplified,such as from buccal cell scrapings,blood spots,or single embryonic cells.
答
这种技术彻底改变了DNA的遗传研究,因为以前没有适合微量的分析可以被放大,如从口腔细胞碎屑,血液斑点,或单胚胎细胞.