Toxic minerals would first be absorbed by roots but later relocated to the stem and leaves.
有毒的矿物质首先被根部吸收，然后转移到茎和叶上。
The first is an automatic, metabolic system whose control is centered in the brain stem.
第一种是自发的新陈代谢系统，它的控制集中在脑干上。
Arousal is at first general, with a flooding of impulses in the brain stem; then gradually the activation is channeled.
一开始觉醒是普遍的，在脑干中有大量的脉冲，然后激活作用逐渐被输送。
Our first article looks at why politicians’ attempts to stem the crisis are failing.
我们的第一篇文章着眼于政客们对遏制危机的努力为何正走向失败。
During its first quarter, McDonald's existing restaurants in China recorded a decline in sales as the company reduced lunch prices to stem the loss of customers to cheaper local alternatives.
在第一季度，麦当劳在华现有餐厅销售额下降，原因是降低了午餐价格，以避免顾客流失到价格更便宜的本土餐厅。
The first response was to create a static page, but they found that this couldn't stem the tide
第一反应是建立静态的页面，但他们发现仍不足以在汹涌的潮水中站住脚
But this is the first-known case of a brain tumor caused by a brain stem cell therapy, according to the report-a phenomenon scientists have predicted in the pages of Scientific American and elsewhere.
这是人们确知的第一例由于脑内干细胞疗法而导致的脑肿瘤，据报告称科学家之前就预言过这种现象，并在科学美国人杂志和其他地方发表过相关文章。
The approval marks the first time human stem cells, extracted and grown from embryos, will be transplanted into patients.
这项批准标志着从胚胎中提取并培育人类干细胞将首次被移植入患者。
Using blood to nourish and grow the stem cells, Zhu managed to induce them to differentiate into three lineages: first bone and cartilage, then muscle, and then neuron.
利用血液去培育干细胞获得成功以后，朱敏设法诱导它们分化成三种细胞系：先是骨骼和软骨细胞，然后是肌细胞，再是神经元。
Losordo, also director of the Feinberg Cardiovascular Research Institute, said this study provides the first evidence that a person's own stem cells can be used as a treatment for their heart disease.
罗索多，也是范恩·伯格心血管研究所的主任，说这次研究提供了第一手的证据一个人自身的干细胞可以用来作为对自身心脏病的治疗。
Their first discovery was that the stem cells were more methylated than the lung cells—5.8% of cytosines, compared with 4.3%.
他们的第一个发现是:干细胞比肺细胞更多甲基化 -相对4.3%而言, 它有5.8%的 胞核嘧啶.
Doctors at a hospital in the city of Atlanta say they have their first patient for the study which will involve the use of stem cells to treat severe spinal injuries.
亚特兰大一家医院的医生表示，他们已经对第一名病人进行了研究，使用干细胞来治疗一些严重的脊髓损伤。
The stem cell transplant is the first therapy to produce an improvement in severe angina subjects' ability to walk on a treadmill.
干细胞移植是引起改善严重心绞痛实验者在跑步机上行走能力的第一疗法。
The birth of yet another laboratory mouse is hardly worth noting — unless the furry creature is the first to be developed from stem cells that do not involve embryonic cells.
通常一只还未出生的实验室老鼠很难引人关注，除非这个长毛的动物将是首个用干细胞培育出的老鼠（不涉及胚胎版细胞）。
One of Barack Obama's first acts as president was lifting the U.S. restrictions on medical research using embryonic stem cells.
巴拉克·奥巴马宣誓就职后施行的第一批政策中，加强对胚胎干细胞医疗研究的限制赫然在列。
Geron, based in California, is the first American firm to test a treatment using human embryonic stem cells.
总部设在加利福尼亚的杰龙是第一家对使用人类胚胎干细胞的治疗进行测试的美国公司。
Last week, Japanese scientists grew a retina from stem cells for the first time.
上周，日本科学家第一次用干细胞种植视网膜。
Researchers there have also grown the world's first hair follicle from stem cells, creating a potential cure for baldness.
柏林的研究者们已经培育出世界上首例来自于干细胞的毛囊，该技术有望被用来治愈脱发。
British scientists have launched the world's first stem cell project to recreate a devastating and incurable brain disease in the laboratory.
英国科学家日前在实验室中，启动了首个治疗无法治愈的和毁灭性的脑科疾病的人造干细胞计划。
Stem cells derived from fat -- liposuctioned from a patient’s belly -- were shown to safely boost heart function after a heart attack, according to a small yet first-of-its-kind study.
一项小规模的前沿性研究发现，从脂肪中提取的干细胞（从病人的腹部脂肪抽取）可以在心脏病发作后安全的增强心脏功能。
Five years later, Bush will use his veto power for the first time to kill legislation that would permit broader federal funding for stem-cell research.
五年后，布什首次动用否决权驳回了一项准许联邦基金支持造血干细胞研究的法案。
One ofBarack Obama's first acts as president was lifting the U.S. restrictions onmedical research using embryonic stem cells.
奥巴马上任伊始，就提高了美国对使用胚胎干细胞进行医学研究的限制。
The world's first official trial using human embryonic stem cells for clinical treatment has begun in the United States.
美国开始了世界上第一例正式的胚胎干细胞疗法临床试验。
"Creating this complex tissue is a first for the stem cell field, " Keirstead said.
Keirstead说道：“在干细胞研究领域，培育像这样复杂的组织还是首次。
That discovery led, 35 years later, to James Thomson's isolation of the first human embryonic stem cells, at the University of Wisconsin in 1998.
这项发现在35年后导致了1998年JamesThomson在威斯康辛大学分离出第一个人类胚胎干细胞。
Reported in the journal cell Stem cell, these results provide a first ever comprehensive elucidation of mechanisms underlying dissociation-induced apoptosis in human es cells.
这是首次比较全面的揭示了细胞分离导致人细胞凋亡的机制，被刊登在干细胞杂志上。
Reports said last week that researchers could be just six months away from producing the world’s first artificial meat, using thousands of stem cells bred in a laboratory.
据英国《每日电讯报》9月6日报道，上周，有报道称，再过6个月，研究人员就可以利用从实验室里培育出的数以千计的干细胞来制造世界上第一块人造肉了。
Reports said last week that researchers could be just six months away from producing the world’s first artificial meat, using thousands of stem cells bred in a laboratory.
据英国《每日电讯报》9月6日报道，上周，有报道称，再过6个月，研究人员就可以利用从实验室里培育出的数以千计的干细胞来制造世界上第一块人造肉了。
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