Burettes are used to deliver a known amount of liquid.
滴定管是用来转移一种已知体积的液体的。
But, it is inherent in the physics of the transistor, when it is used in this manner, that the output will vary by a known amount for a given change in temperature.
不过，当这么使用晶体管时，因为其固有物理属性，对于某一给定的温度改变其输出也会产生一个已知数量的变化。
In the case of quantitative analysis of impurities accuracy should be assessed on samples (of drug substance or drug product) spiked with known amount of impurities.
对于杂质的定量分析，应使用以已知数量杂质增敏的样榀来评估准确度。
One result of his research is known as the total time hypothesis, which simply means the amount you learn depends on the time you spend trying to learn it.
他的一项研究成果被称为“总时间假说”，即你学习的总量取决于你花在尝试学习它上的时间。
So we are burning up an enormous amount of fuel at every launch just to get the rocket up to what's known as escape velocity.
所以每一次发射我们都要耗费大量的燃料来让火箭达到所谓的“逃逸速度”。
If you're running known queries against large sets of data, they can provide a scalable solution as the amount of data you are working with grows.
如果您正对数据的大集合进行已知的查询，那么由于数据量正在增加，它们可能会提供一种可伸缩的解决方案。
Known as' the world of salt ', Tsaidam Basin boasts three features: the greatest amount of reserves around the world plus a high quality and variety of salt.
誉满全球的“世界盐都”，柴达木盆地有以三种容貌而闻名：世界上最多数量的保护区加上高质量和多种类的盐。
Technological advances have vastly increased doctors' diagnostic tools and treatments, and have exponentially expanded the amount of information on just about every known disease.
技术的进步极大地提升了医生的诊疗手段，也为每一种已知疾病提供了海量信息。
Actual the actual amount of money was not known although they knew it was large.
虽然他们知道钱数很大，不过仍不知道实际的数目。
The history of World War II is well documented and much more is known about this conflict than any other in history due to the amount of surviving documents and, of course, living testimony.
二战这段历史被很好的记载，比起历史上的其它事件，人们通过大量现存文献，当然还有活着的证人，更多得了解了这场战役。
Comparing amount of cash generated to outstanding debt, known as the operating cash flow ratio, illustrates the company's ability to service its loans and interest payments.
把已创造现金数额与未偿还债务作比较，也就是经营现金流比可以说明该公司偿债付息的能力。
And even though we have known this day was coming for some time now, we awaited it with no small amount of dread.
尽管我们彼此都知道这一天终将来到，我们等待着，绝无一点畏惧。
There is a known issue with the amount of ROM space available on an xSeries 346 that creates PCI allocation errors during boot.
xSeries 346上可用ROM的空间数量存在一个问题，在引导时可能会出现PCI分配错误。
The amount of water intake can lead to poisoning can not be known with certainty and varies in each individual.
纳入的水分含量可导致中毒，这不是每个人都确信不疑，也是因人而异的。
It has long been known that the amount of muscle in the body is related to bone growth, but the new study shows that fat mass is also important in building bone, particularly in girls.
众所周知，人体的肌肉与骨骼生长密切相关。最新研究显示，脂肪组织同样对骨骼发育起着重要的作用，而且这一作用在女孩子身上尤为明显。
The amount of particles, known to scientists as aerosols, fluctuates naturally with the seasons and natural events, as well as with human activities.
那些被科学家们熟知且被称为悬浮微粒的大多数粒子，会随着季节、自然事件以及人类活动的变化而自然的变动。
This kind of targeted attack - known as spear-phishing - has become so dangerous because of the amount of information we divulge on the Internet.
这样带有目标性的攻击——叫做鱼叉式网路钓鱼——已经变得很危险，因为我们通常会在因特网上泄露大量的信息。
Scientists have long known that vitamin D is a vital nutrient that the skin produces when hit by sunlight. The amount varies, depending on where the person lives, skin pigment, age and other factors.
科学界的共识是,人的皮肤可以通过日晒产生维生素D.而产生的数量并不固定,这取决于人所在地,皮肤的状况,年龄以及其他的因素.
This is a known and anticipated process, but the amount of hydrogen gas produced was unknown because the operators didn’t know the exact temperature of the fuel rods or the water level.
这个过程是被预见的，但是大量的氢气是否会产生无法预测，因为操作员并不知道燃料棒的确切温度，也不知道水位线到底多高。
This is a known and anticipated process, but the amount of hydrogen gas produced was unknown because the operators didn't know the exact temperature of the fuel rods or the water level.
这个过程是被预见的，但是大量的氢气是否会产生无法预测，因为操作员并不知道燃料棒的确切温度，也不知道水位线到底多高。
Doctors have long known that some antidepressants and other medicines can lower the amount of tamoxifen's active form in the bloodstream.
医生很早就知道，某些抗抑郁药物可以降低他莫昔芬在血液中的活性成分浓度。
Despite the vast amount of archaeological activity and academic study into Stonehenge and its landscape over the centuries, relatively little is known about the lichen-covered surfaces.
尽管数个世纪以来针对巨石阵已经进行了大量的考古活动和科学研究，但对于其被青苔覆盖的表面相对而言却知之甚少。
The precise amount that Banks make trading derivatives isn't known, but there is anecdotal evidence of their profitability.
银行在衍生产品交易中获利的准确数字不被人所知，但是有传说中的证据证明他们的利润。
The unknown concentration can then be calculated from the amount of known reagent used.
然后未知溶液的浓度就可以通过被消耗掉的已知溶液的体积计算出来。
The unknown concentration can then be calculated from the amount of known reagent used.
然后未知溶液的浓度就可以通过被消耗掉的已知溶液的体积计算出来。
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