All the isotopes of a given element have the same number of protons, but differ in their number of neutrons, and hence in their atomic mass.
给定元素的所有同位素都含有相同的质子数，但它们的中子数不同，因此它们的原子质量也不同。
I had gained weight in the form of muscle mass, but thinking only of lowering the number on the scale, I altered my training program.
肌肉量增大，我的体重就增加了，但因为只想着降低体重称上的数字，我改变了训练计划。
The number of mass shooting in the US has quickly increased in recent years.
近年来，美国的大规模枪击事件迅速增加。
And, I mean literally, mass, not mole number.
我想罗嗦一下，质量，而不是摩尔数。
Knowing your Body Mass Index (BMI) is the second number you should know. You need two Numbers to calculate your BMI, your height and weight.
你需要了解的第二个数字是身体质量指数(BMI)，你要用身高和体重来计算你的BM I值。
That number is likely to grow as a slew of major U.S. companies have announced mass layoffs this month.
这一数字很可能会继续增长，因为一系列美国大公司本月已宣布大规模裁员。
You just need a few macroscopic variables that are very familiar to you, like the pressure, the temperature, the volume, the number of moles of each component, the mass of the system.
你只需要某些你非常熟悉的宏观变量，比如压强，温度，体积，每个组分的摩尔数，系统的质量。
Then I have the total mass of A divided by the number of moles of A.
然后是A的总质量,除以A的摩尔数。
A number of studies have shown that the presence of a critical mass of women in senior jobs is positively correlated with a company's performance and possibly with higher profits.
一些研究表明，决策层女性占关键多数可能和公司业绩改善、利润提高有关。
Construction of a mass rapid-transit railway is due to start in 2011, but with the number of passengers expected to reach just 400,000 a day by 2020 it will hardly ease the congestion.
一项大规模高速运输轻轨交通系统定于2011年动工。但是预计到2020年乘客数量每天将达40万人次，因此即使该高速运输系统投入使用也很难缓解拥堵的压力。
"These are just the ones that we found," study co-author Bennett said. "If we could see lower-mass planets, then presumably the number would be even larger."
“我们仅仅发现了这么多，如果能看到更小质量的行星，这一数字想必会更大。”研究报告的撰稿人之一，贝内特说。
A number of medications are available to help slow bone loss and maintain bone mass, including bisphosphonates (Fosamax, Actonel, Boniva) and raloxifene (Evista).
许多药物治疗可以有助于减缓骨质流失和保持骨量，其中包括二膦酸盐(福善美、Actonel、Boniva)和雷洛昔芬(Evista)。
So I have one mass of unit 1-- - I will tell you what that is-- and I bang that into number 2.
现在规定一单位的质量-,我会告诉你这是什么-,使它与物体2相碰。
However a number of documents dating from a 1990s Russian probe into Katyn, which include the names of those who committed the mass executions, remain classified.
20世纪90年代俄罗斯对卡廷事件进行过调查，涉及到执行大规模处决行动的部分人员，然而，这些文件对他们的名字仍然实行严格保密。
Here is the mass per number of sheets with a linear fit.
根据下面的线性拟合图可以算出每张纸的质量。 横轴为纸张数量，纵轴为相应数量的纸张的总质量（单位：克）。
Inside these nations there will be mass prosperity, but with a large minority in serious poverty, and a small number who are very rich.
这些国家虽然呈现出欣欣向荣的态势，但是其中还有许多极端贫穷的弱势人群，还有少量富有人群。
Australian scientists fear the planet is on the brink of another mass extinction as ocean dead zones continue to grow in size and number.
澳大利亚科学家担心，随着海洋死区范围和数量不断加大，地球已到了另一次大灭绝的边缘。
Many are bigger than the gas giant Jupiter, but astronomers have found an increasing number of worlds close to Earth's mass, some of which may be habitable.
他们当中的许多都比气体巨行星木星还要大，不过天文学家还是发现了相当数目的和地球差不多大小的星体，其中的一些可能还适宜居住。
But in recent years astronomers have used radial velocity to find or confirm a number of planets down to a few times Earth's mass.
但是，近年来天文学家通过径向速度法去发现或证实大量小到只有几倍的地球质量的行星。
Mass customisation USES some of the techniques of mass production; for example, its output is based on a small number of platforms, core components that underlie the product.
大规模定制运用了一些大规模生产的方法；比如说，大规模定制的产品都是基于一些小的标准集合，核心部件来构成产品的。
Indeed a number of carmakers are looking at ways to mass-produce cars built from composites, including BMW, which is developing a range of urban electric vehicles.
事实上很多的汽车制造商正在寻找运用复合材料批量生产汽车的方法，其中就包括BMW，他们正在开发一系列的城市电动车。
Getting a better picture of the Milky Way's mass and its structure may ultimately rely on a number of methods.
要更好地知道银河系的质量和结构最后可能要依赖多种方法。
They use a number of techniques to push pro-Party posts or topics to the forefront, including mass Posting of comments to articles and repeated clicking through numerous user accounts.
他们使用各种技术将爱党的相关帖子话题推至前台，包括灌水和用多个帐户重复点击。
And the number of U.S. states with more than 30 percent of their population topping a body mass index (BMI) of 30 tripled between 2007 and 2009.
在美国，超过30%人口超过体重指数(BMI)30的洲数量从2007年到2009年翻了三倍。
As you age, a number of changes occur in your skeletal muscles, which are the ones that move your arms, your legs and the rest of your body. You lose muscle mass — you simply have less of the stuff.
当你上了年纪，那些手臂、腿部和身体其它部分动作所需的骨骼肌肉会发生一系列变化。
Number one is we lose a percentage of our muscle mass on a yearly basis.
第一位的是我们失去每年的肌肉质量的百分比。
Templates provide the simplest means of setup and mass deployment of an Enterprise Replication system for IBM customers with a large number of tables.
模板为拥有大量表的IBM客户提供了最简单的方式来设置和大规模部署EnterpriseReplication系统。
The mass media affects the lives of our young by acting as a(an) 1 for a number of institutions and social contacts.
大众媒体作为许多机构和社会交往的替代品影响着年轻人的生活。
This is a small number and it is anyone's guess if it constitutes a critical mass.
这是一个小数目，这是任何人的猜测，如果它构成临界质量。
This is a small number and it is anyone's guess if it constitutes a critical mass.
这是一个小数目，这是任何人的猜测，如果它构成临界质量。
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