当一种叫淀粉样前体蛋白（APP）的分子被两种酶——分别叫作贝塔-分泌酶和伽玛-分泌酶——切断时就形成了淀粉样斑块。
Amyloid plaques form when a molecule called amyloid precursor protein (APP) is chopped up by two enzymes known as beta-secretase and gamma-secretase.
在培养皿实验中，修饰后的分子与其前体一样有效。
When tested in Petri dishes, the new molecules were as good as their precursors.
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)。
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。
Then they grew human mesenchymal stem cells - the precursors of bone, muscle and many other tissue types - on the gels.
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。
You can also induce the cells by using compounds called precursors to produce other new compounds by way of biotransformation.
前体离子扫描是指监测前体离子的特定损失。
Precursor ion scanning refers to monitoring for a specific loss from the precursor ion.
“亚洲是一体的”是《东洋的理想》一书的开篇第一句话，这本书出版于一个多世纪前，作者是日本的美术家冈仓天心。
“Asia is one” was the opening sentenceof a book published just over a century ago by a Japanese art historian calledKakuzo Okakura, entitled “Ideals of the East”.
目的是要在明显的临床体症出现前查出癌症。
The goal is to detect cancer before clinical signs are noticeable.
当人们想象未来的事件时，前额叶皮层，前扣带皮质和海马体之间，有一个复杂的的“功能耦合" 。
When people imagined future events, there was an intricate "functional coupling" between parts of the prefrontal cortex, the anterior cingulate cortex and the hippocampus.
1910年前，他在四面体风筝方面的研究，导致了这艘飞行器的开发。
His work with tetrahedral kites led to the development of this flying machine a few years before 1910.
去年，整个经济体增加了130万个就业岗位，每个季度都比前一个季度有所增长，这意味着企业雇工的速度开始增长。
The economy added 1.3 million jobs last year, and each quarter was stronger than the previous quarter, which means that the pace of hiring is beginning to pick up.
作为一个志愿者组织，国际业余卫星组织在当前立方体卫星热潮之前的几十年前就在将“业余”卫星送入轨道。
As an organization of volunteers, AMSAT was putting "amateur" satellites in orbit decades before the current CubeSat craze.
结果和他们的预期一致：感情丰富的图片能在视觉皮层被激发前刺激杏仁体部分的反应。
And results were in line with their prediction: the emotional pics activated the amygdala well before part of the visual cortex.
就在6年前，空中客车工业公司从一个由欧洲飞机制造商组成的市场联盟，整合成为了一体化的公司。
Just over six years ago Airbus Industrie was transformed from a marketing consortium for a group of European aircraft-makers into an integrated company.
现在存在的所有Y染色体都来自于一个被认为生活在大约14万年前的同一祖先。
All Y chromosomes in existence today are descended from a single ancestor's who is thought to have lived about 140,000 years ago.
在不久前发生的这场危机前及危机期间，几个拉美和亚洲经济体开始实施浮动汇率制，而中国却令人瞩目地未采取这一做法。
Before and during the recent crisis, several Latin American and Asian economies — with the notable exception of China — let currencies move.
欧元区最大的经济体德国下滑的尤为严重：其GDP在三月之前的三个月里下降了3.8%，而从一年前的衰退到现在，GDP暴跌了近7%。
Germany, the largest economy in the group, fell even harder: its GDP shrank by 3.8% in the three months to March and has plunged by almost 7% since its recession began a year ago.
在欧元区的诞生的前10年里，其最大的经济体德国停滞不前，但是经过长期的薪酬限制之后其出口产业开始提升经济。
For much of the euro zone's first decade Germany, its largest economy, was in the doldrums, but after a long period of wage restraint its export industries started to lift the economy.
罗德-爱丁顿爵士，前英国航空公司的老总，在2006年回顾英国的交通需求时表示，一个成熟的经济体很少会因为单个项目而获得巨大的收益。
Sir Rod Eddington, a former boss of British Airways, argued in a 2006 review of Britain’s transport needs that mature economies rarely see huge benefits from a single project.
到2012年，世界前20个市场中有九个将成为新兴的经济体。
By 2012, nine of the top 20 markets will be emerging economies.
为了打消设计上的疑虑，五年前Kushner曾在另一位等离子体研究员的实验室中将光秃秃的拇指伸进灭菌等离子体喷口。
Reassured by that design, about five years ago he put his naked thumb into a jet of microbe-destroying plasma at the lab of another plasma researcher.
中国的经济正勇往直前并已于去年超过日本成为世界第二大经济体，而这一头衔日本已经保持了40多年。
China's economy is powering ahead and overtook Japan as the world's second-largest economy last year, a title Japan had held for more than 40 years.
而就整体来说，亚洲经济体的表现不仅好于10年前，而且还胜过同时期的东欧、拉美等其他新兴经济体。
In general, however, the Asian economies are not only in much better shape than a decade ago, but also when compared with other emerging economies in eastern Europe or Latin America.
从粉色到棕色的变化不仅帮助防止了晒伤，而且还让合适数量的阳光穿透皮肤从而把未激活的前体变成维生素d3。
The variation from pink to brown not only helps to prevent sunburn but also allows appropriate amounts of sunlight to penetrate the skin to create the vitamin D3 from its inactive precursors.
从粉色到棕色的变化不仅帮助防止了晒伤，而且还让合适数量的阳光穿透皮肤从而把未激活的前体变成维生素d3。
The variation from pink to brown not only helps to prevent sunburn but also allows appropriate amounts of sunlight to penetrate the skin to create the vitamin D3 from its inactive precursors.
应用推荐