The major reason of variation is change in DNA level.
变异的主要原因是DNA发生改变。
Epigenetics commonly refers to the developmental process by which cellular traits are established and inherited without a change in DNA sequence.
表观遗传学通常意指通过表观遗传学，细胞特征被建立并且遗传，而在DNA序列上没有改变的发育过程。
Things written in pen you can't change. That's DNA. But things written in pencil you can.
用钢笔写下来的东西是无法改变的。这是 DNA。但是用铅笔写下来的东西是可以改变的。
Reed's research shows that though nothing can truly change our DNA, environmental differences that a child experiences before birth and in their first year can sometimes affect the way the DNA behaves, making even identical twins into very different people.
里德的研究表明，虽然没有什么能真正改变我们的 DNA，但孩子在出生前和出生后第一年所经历的环境差异有时能够影响 DNA 的表现方式，甚至使同卵双胞胎变成两个很不同的人。
Their trouble with language had been caused by the change of a single nucleotide of dna-just one letter in the genetic sequence.
他们的语言问题仅仅是因为DNA中一个核苷酸发生了改变，也就是说基因序列中有一个字母被改写了。
In the future, the benefits of these "fit" genes might be extended to the general population through gene therapy-the use of pharmaceuticals to change the DNA structure of a living person.
在未来，这些“适应”基因将通过基因疗法推广到普通大众——通过使用药品改变活人的DNA结构。
A new generation of clinically approved 'cosmeceuticals', which alter the DNA in your hair and skin, could change for ever the way we look at make-up - and the ageing process itself.
新一代经临床认证的‘药妆品’，可改变头发和皮肤的DNA，可能会永远转变我们对化妆的看法——以及衰老过程本身。
Change seems embedded in the company's DNA.
变革似乎已经嵌入了这家公司的DNA。
As DNA develops, chemical changes take place. While the DNA itself does not change, the way in which individual genes are expressed may vary between the twins.
随着DNA的进化，化学反应开始发生。虽然DNA本身并没有改变，但它在个人身上的表现显性就会出现很大的不同。
Researchers looked for - and found - a chemical change called DNA methylation in healthy tissue adjacent to breast tumors.
研究者寻找并发现了靠近肿瘤组织的健康组织中有“DNA甲基化”这种化学改变。
These damages can vary from a change to a single part of the DNA to a total break in the DNA structure.
这些损伤包括DNA单一部分的改变到DNA结构上的全部断裂的不同程度。
This change of DNA quantity might result from the improvement of microcirculation or(and) stimulus to hematopoietical cells which accelerated the DNA anabolism in these cells.
补肾化瘀方药影响DNA含量的机理可能与改善骨髓微循环或（和）刺激造血细胞从而促进DNA合成代谢有关。
Objective To investigate the expression change of DNA-PK in breast cancer tissue and the clinical significance.
目的探讨乳腺癌组织中DNA依赖蛋白激酶（DNA-PK）的表达变化及其意义。
Objective to explore the change of DNA content, cell cycle distribution and expression of cell cycle regulatory elements in esophageal canceration course.
目的探讨食管上皮癌变过程中DNA含量、细胞周期分布的变化及多个相关的细胞周期调控因子的表达状况及其意义。
To investigate the change of HBV DNA in children with hepatitis B. HBVM and HBV DNA were detected by microparticle enzyme immunoassay (MEIA) and PCR respectively.
了解小儿乙型肝炎病毒(HBVDNA)复制水平的变化及其临床意义。采用微粒子酶免分析法(MEIA)检测HBVM，荧光定量pcr法检h BV DNA。
Purpose: To verify the effect of folate deficiency on fetal rats intrauterine brain development, the change of DNA methylation in fetal rats brain with maternal folate deficiency was studied.
目的：探讨叶酸缺乏对胎鼠宫内脑发育的影响，研究叶酸缺乏孕鼠子代脑组织基因组dna甲基化水平的改变，为叶酸缺乏造成脑发育障碍提供分子水平的依据。
Polyamines change structure of chromosome and interfere with DNA methylation process, which is involved in the pathogenesis of autoimmune diseases.
多胺改变了染色体的正常结构，干扰了DNA的甲基化过程，在自身免疫性疾病中的发病作用近来引起了人们的关注。
He found that in about a third of them, there was more change in the DNA in those trees where more species had been generated.
他发现有大约三分之一的树种其DNA的改变同衍生出的物种数呈现正相关性。
Gene function may be altered by either a change in the sequence of the DNA or a change in epigenetic programming of a gene in the absence of a sequence change.
基因功能可能通过DNA在序列上的一个变化或通过缺乏序列变化的一个基因在表观编程中的一个变化而被改变。
While the DNA itself does not change, the way in which individual genes are expressed may vary between the twins.
虽然DNA本身并没有改变，但它在个人身上的表现显性就会出现很大的不同。
Enhanced UV-B radiation could increase crops' flavonoid content but decrease their chlorophyll content and photosynthesis, induce gene change, and result in DNA damage and change of protein content.
辐射增强，作物叶片类黄酮含量增加、叶绿素含量降低、光合作用减弱，同时UV - B辐射诱致基因活性变化，导致DNA损伤和蛋白质含量的改变。
There has been no detectable change in human DNA, brought about by biological evolution, in the ten thousand years of recorded history.
在有文字记载的历史的这一万年间，在人的DNA中不存在由生物进化带来的可察觉的变化。(人的脱氧核糖核酸没有变化。)
A single base change in our DNA can lead to a 100,000x change in metabolite levels.
这是因为在我们DNA中的一个碱基的改变就可能导致代谢水平十万倍的改变。
Epigenetics is the study of genetic changes in gene expression without the sequence change of DNA, in which DNA methylation is one of the most widely studied epigenetic mechanism.
表遗传学是研究在DNA序列没有改变的情况下，所发生的可遗传性基因表达的改变，其中DNA甲基化是研究最多、最深入的一种表遗传学表达机制。
Epigenetics is the study of genetic changes in gene expression without the sequence change of DNA, in which DNA methylation is one of the most widely studied epigenetic mechanism.
表遗传学是研究在DNA序列没有改变的情况下，所发生的可遗传性基因表达的改变，其中DNA甲基化是研究最多、最深入的一种表遗传学表达机制。
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