所有的生物都由细胞组成。
光感受器是通过发出化学信号来对光作出反应的细胞。
Photoreceptors are cells that respond to light by sending out a chemical signal.
这两种药物携手合作，共同对抗疾病，帮助修复受损的细胞和组织。
The two drugs work hand in hand to combat the disease and help to repair damaged cells and tissue.
干细胞治疗领域的好消息来自本周发表在《柳叶刀》杂志上的一篇论文。
The good news for the field of stem-cell therapy comes from a paper published in this week's Lancet.
动机只是个小小的细胞，一个胚芽，作曲家将从中创造出其他的音乐素材。
A motive is just a little cell, a germ, out of which the composer will build other musical material.
总有一天，我们也许能够利用端粒酶使任何细胞保持活力，使其正常工作并永久地自我复制。
Someday we may be able to take any cell and keep it alive functioning and reproducing itself essentially forever through the use of telomerase.
你的身体会在每个细胞中产生更多更强的线粒体，让你更强大，让你对生活中的一切都更有耐力!
Your body creates more and stronger mitochondria in each of your cells, making you more powerful and giving you more endurance for everything in your life!
她从1990年开始接受治疗，采用了一种革命性的新疗法，试图从她白细胞基因的源头纠正缺陷。
She was treated beginning in 1990 with a revolutionary new therapy that sought to correct the defect at its very source, in the genes of her white blood cells.
你操作显微镜和洋葱细胞样本的方式，以及对细胞分裂各阶段的仔细观察、描绘和解释，让我印象非常深刻。
I was so impressed with the way you handle the microscope and the samples of onion cells, and with how carefully you observed and diagramed and interpreted each stage of cell division.
“它们可以帮助神经细胞处理并储存信息。”布鲁斯·麦克尤恩博士（Dr. Bruce McEwen）说。
"They can help nerve cells handle information and put it into storage," says Dr. Bruce McEwen.
你体内的大多数细胞每条染色体都有两份拷贝，因此，每个基因也都有两份拷贝：一份来自你的母亲，一份来自你的父亲。
Most cells in your body have two copies of every chromosome and, therefore, two copies of every gene: one from your mother and one from your father.
在研究玉米的基因构成时，芭芭拉·麦克林托克发现了一种新的突变基因，这一发现使人们对细胞分化有了更深入的了解。
While studying the genetic makeup of corn, a new class of mutant genes was discovered by Barbara McClintock, a discovery which led to greater understanding of cell differentiation.
今天，生物学家利用21世纪的工具来研究细胞和DNA，开始了解这些植物是如何捕食和消化的——以及这些奇异的适应性最初是如何产生的。
Today, biologists, using 21st-century tools to study cells and DNA, are beginning to understand how these plants hunt, eat and digest—and how such bizarre adaptations arose in the first place.
色素团下面是一层细胞，它可以反射周围环境的光，这些细胞可以帮助章鱼精确地匹配周围的颜色。
Just below the chromatophores is a layer of cells that reflect light from the environment, and these cells help the octopus create a precise match with the colors that surround them.
科学家可以用人类细胞来培育新的器官。
在这段时间里，身体会进行自我修复并且促进细胞再生。
During this time, the body repairs itself and makes more cells.
干细胞研究人员已经找到了一种从成年人身上获得完全可用的干细胞的方法。
Stem cell researchers have found a way to get perfectly usable stem cells from fully grown human beings.
每个活细胞都会发出微小的电脉冲。
人，既是城市的细胞，又是城市的灵魂。
氧气驱动着呼吸过程，给我们的细胞提供能量。
Oxygen drives the process of respiration, which provides our cells with energy.
黑色素可以吸收辐射，保护你的细胞不受损伤。
The pigment absorbs the radiation and protects cells from damage.
所有的植物和动物都是由细胞构成的。
锌参与身体的各项机能，从产生DNA到细胞修复。
Zinc is involved in hundreds of body processes, from producing DNA to repairing cells.
在医学上，干细胞已经如同医用听诊器那样随处可见。
Stem cells, it seems, have become almost as ubiquitous in medicine as stethoscopes.
例如，将干细胞置于流动的流体中，它们就能生成血管。
Expose stem cells to flowing fluid, for instance, and they turn into blood vessels.
在消化过程中，蛋白质被分解成氨基酸——构成细胞的原料。
During digestion, protein breaks down into amino acids, the building blocks of cells.
两年后，令所有医生惊讶的是，程恩华的癌细胞已经消失了。
Two years later, to the surprise of all the doctors, Cheng's cancer cells had disappeared.
即使觉得自己身上缺少幽默细胞，你也要对自己抱有希望。
Even if you feel that you don't have a funny bone in your body, there is hope.
这不仅为在细胞中储存文本，也为储存图像、音乐甚至视频开辟了道路。
This opens up the way to storing not only text, but images, music, and even video within cells.
这项工作很重要，因为与其他体细胞不同，人类卵细胞是不可替代的。
This is an important job because human eggs are not replaced, unlike most cells in the body.
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