I asked the clerk. She rummaged around and held up a stem of green silk orchids.
我问秘书。她左右，并举行了一个干的绿色丝绸兰花。
They attempt to carve a circle like the moon, a straight line like a stem of wheat, a square like a brick, and jaggedly like the beard.
他们试图把一个圆像月亮，直线像干小麦，方形砖，和参差不齐的胡须一样。
There's a lot of interests in obtaining stem cells from the blood of the umbilical cord on birth.
人们对从出生时的脐带血液中获取干细胞很感兴趣。
The good news for the field of stem-cell therapy comes from a paper published in this week's Lancet.
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。
These spiral vessels are part of a banana plant stem.
这些螺旋状的脉管是香蕉植物茎的一部分。
The range through these states is mediated by the arousal system, a network of tracts converging from sensory systems to integrating centers in the brain stem.
这些状态的变化是以激发系统作为媒介完成的，而所谓激发系统，是指从各个感觉系统汇聚到位于脑干中整合中心的一个网络。
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。
The explanation is that each aspen while appearing to exist separately as a single tree, is in fact only the stem or shoot of a far larger organism.
对此的解释是，每一棵白杨，虽然看起来是独立存在的一棵树，但实际上只是一个巨型有机体的茎或芽。
In 2006, Gurdon's work was developed by Yamanaka to show that a sample of a person's skin can be used to create stem cells.
2006年，山中伸弥对古尔登的研究成果进行了进一步研究，以证明一个人的皮肤样本可以用来制造干细胞。
She noticed there was a real void in quality STEM education at all levels of the public educational system.
她注意到，不同等级的公共教育体系都确实存在高质量STEM教育的缺失。
In the past decade, we have seen a considerable increase in England in the number of women accepted on to full-time undergraduate degrees in science, technology, engineering and maths (Stem subjects).
在过去的十年里，我们见证了英国攻读科学、技术、工程和数学（Stem 学科）全日制本科学位的女性人数的大幅增长。
Examples of ablaut as a grammatical marker in Latin are the vowel changes in the perfect stem of verbs.
例如在日耳曼语强动词中的元音变换是拉丁动词变形范例的直接派生。
In the epicormic shoot stem which passed a growth season, the secondary laticifer differentiation of all the extension parts was accelerated by JA application.
在经过生长期的表皮茎上，施用茉莉酸能够促进各个伸长单位茎中次生乳管的分化。
The defining feature of a stem cell is self-renewal.
干细胞的特征就是自我再生能力。
When a part of the brain stem known as the pons is destroyed, people no longer experience REM sleep.
当病人大脑脑干的“脑桥”部分被废，快速眼部活动(REM)睡眠不再出现。
A quarter of the methylated cytosines in stem cells, however, were not followed by guanines.
然而，干细胞里四分之一的甲基胞核嘧啶却没有鸟嘌呤随后。
If there was a way of extracting the stem cells without destroying them, I would not be opposed to it.
如果有一条可以不毁灭胚胎而提取干细胞的途径，我就不会反对。
Policymakers in the United States and abroad deployed a number of tools to stem the panic.
美国和世界其他地方的决策者们采用了一系列的工具来阻止恐慌。
Thus, the value of going to a movie together does not stem mainly from the quality of the movie but from watching it together.
这样，一起去看一场电影的价值并非主要来自电影的质量，而是来自你们一起看这件事。
Last year a group at the University of Minnesota found a way to guide into human embryonic stem cells into becoming a potent type of white blood cell which destroys tumour cells.
去年，美国明尼苏达大学的研究小组找到了一种办法，把人类胚胎干细胞引导成一种强有力的白细胞，这种白细胞会破坏肿瘤细胞。
Those efforts offer a model for regulation of stem-cell therapies.
这些努力为今天干细胞疗法的准则提供了范本。
All of which is a shame because, after a long period of lofty promises, embryonic-stem-cell science is starting to get interesting.
所有这一切都是一个耻辱，因为经过长时间的崇高承诺，胚胎干细胞科学开始变得有趣了。
It's the hypothalamus, which sits right above the brain stem and regulates a variety of functions, including sleep, body temperature, thirst and hunger.
这是因为位于大脑后端右上部分的下丘脑管理着人体许多的功能，包括睡眠、体温、口渴和饥饿。
Last year a group at the University of Minnesota found a way to guide human embryonic stem cells into becoming a potent type of white blood cell which destroys tumour cells.
去年，明尼苏达大学的一个科研小组找出了一种可以引导人类胚胎干细胞，使其转化成强有力白细胞类型的方法，从而破坏肿瘤细胞。
The research is allowed in Britain, which in the years since Bush's restrictions, has become a world centre of stem cell study.
在英国该研究是允许的，自从布什的禁止令以来英国成为了世界干细胞研究的中心。
More disconcerting is the ability of a cancer stem cell to hide.
更令人困惑的是癌症干细胞的隐藏能力。
Part of that terror may actually stem from a famous attribute of sharks: their need to keep swimming in order to breathe.
上面所说的恐惧也许就是因为鲨鱼的一个广为人知的特点：也就是它们需要一直游动才能呼吸。
Part of that terror may actually stem from a famous attribute of sharks: their need to keep swimming in order to breathe.
上面所说的恐惧也许就是因为鲨鱼的一个广为人知的特点：也就是它们需要一直游动才能呼吸。
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