Pap smears work by detecting abnormal cells that are cancer precursors and that can be destroyed using techniques like lasers.
巴氏涂片可以检测异常细胞，这些细胞是癌症的前兆，可以使用激光等技术来摧毁它们。
So what are today's precursors?
那么今天的预兆是什么呢？
The chemicals include deadly pesticides and their even deadlier precursors.
这些化学品包括一些能致人死地的农药成品以及危害相当的制作原料。
So what are today's precursors? I think there's just one: the ubiquitous web.
那么今天的预兆是什么呢？我认为只有一个：无所不在的互联网。
When tested in Petri dishes, the new molecules were as good as their precursors.
在培养皿实验中，修饰后的分子与其前体一样有效。
Minoru Freund believes other earthquake "precursors" could feed into this system.
明纳路弗洛伊德相信别的地震“先驱”对这个系统会有补充作用。
Scientists at the YVO closely monitor the Yellowstone region for such precursors.
在钒酸钇科学家密切留意这类前体黄石地区。
In many ways, they were the precursors to modern mash-ups - sort of like local mash-ups.
在许多方面，它们是现代mash - up的前身—有点像本地mash - up。
To date, the amyloid proteins and their precursors shown in Table I have been identified.
迄今为止，在表i中的淀粉样蛋白和他们的前体已经被确定。
But the release of NPY can stimulate the reproduction of cells that are precursors to fat cells.
但是NPY的释放可以刺激那些可以变成脂肪的细胞，促进他们的产生。
In this framework, countries in which research on precursors is still encouraged and funded are very few.
在这样的框架下，在继续鼓励对地震前兆进行研究的国家经费很少。
Without doubt, the United States is exhibiting some of the classic precursors to out-of-control inflation.
无庸置疑的是，美国市场已经呈现出无法控制的通货膨胀的预兆。
But one of Milton's projects in Paradise Lost is to effect his forgetting of all of his literary precursors.
但是弥尔顿在《失乐园》中的一个计划是，让自己忘记所有文学前辈。
It is up to us, over these two days and in the work that follows, to show that words are precursors to action.
在这两天乃至今后的工作中，要由我们来展现什么是言先于行'。
After all, the precursors were already evident: the PC, global online services like CompuServe, and carphones.
毕竟，预兆已经很明显：个人电脑，如CompuServe这样的全球线上服务，车载电话。
Then they grew human mesenchymal stem cells - the precursors of bone, muscle and many other tissue types - on the gels.
然后在凝胶上培育人体间质干细胞——骨骼、肌肉和其他组织类型的前体。
Finally, phagocyte precursors may undergo malignant transformation, which results in acute or chronic myelogenous leukemia.
到最后，吞噬细胞前体可能发生恶变，导致急性或慢性骨髓性白血病。
You can also induce the cells by using compounds called precursors to produce other new compounds by way of biotransformation.
你还可以用前体化合物让细胞通过生物转化的方式制造其他新的化合物。
Rough estimates suggest that any useful quake forecast method demands precursors that will prove correct 98 per cent of the time.
粗略的计算显示，任何有价值的地震预测手段，其观测的地震前兆的准确率必须达到98%以上。
Organizations have been using management system standards and their precursors in one form or another for more than 200 years.
组织以一种形式或其他形式使用管理体系和管理体系的前身已经有200多年了。
The liver is the major site of gluconeogenesis from red blood cell–derived pyruvate and lactate and from amino acid precursors.
肝脏是从红细胞衍生的丙酮酸盐和乳酸盐以及氨基酸前体中进行糖异生的主要位点。
The experiments showed that the strength, brittleness and ductility, volume change and failure precursors are concerned with stress paths.
实验表明几种岩石的强度、延性和脆性、体积变化和破坏前兆等与应力途径有关。
The T-cell precursors then go to the thymus, a small organ located under the breastbone, where they are called early thymic progenitors (ETPs).
然后，T细胞的前体前往胸腺——一个位于胸骨下的小器官，在那里，它们被叫做早期胸腺祖细胞(ETPs)。
As chemical precursors stream onto the surface of a rolling metal or plastic substrate, they react with one another to form a network of nanoparticles.
各化学母质流向滚动中的金属或塑料基片的表面，他们互相作用，形成一层纳米级微粒网状结构。
Having no chloroplasts of their own, the fungi cannot synthesize the precursors of respiration, and so they piggyback on the trees' ability to do this.
因为自己没有叶绿体，它们无法合成呼吸需要的某种细胞，因此它们依赖树的能力去完成。
Once he got the PC, Katz started writing programs, spending most of his free time on electronic bulletin board services, the precursors of the Internet.
得到这台PC以后，Katz立即开始在上面编写程序，将他大部分的空闲时间花在电子布告栏系统(BBS)上面，那是互联网的前身。
For humans, humor and laughter are sometimes easier vibrations to access than joy at first, and are precursors to moving into greater joy in the moment.
对人类而言，首先幽默和笑声有时是比欢乐更容易进入的振动，是在片刻就可移入更大的欢乐中的先行者。
For humans, humor and laughter are sometimes easier vibrations to access than joy at first, and are precursors to moving into greater joy in the moment.
对人类而言，首先幽默和笑声有时是比欢乐更容易进入的振动，是在片刻就可移入更大的欢乐中的先行者。
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