Using light as an external power source can alleviate the weight and mass of having an onboard system, leaving room for scientific payloads, for example, and it provides more propulsive power.
利用光束作为外部能量源可以减轻火箭自身携带的系统重量和质量，为科学研究扩大有效载荷空间，并提供更大的推力。
Sculptures must, for example, be stable, which requires an understanding of the properties of mass, weight distribution, and stress.
例如，雕塑必须是稳定的，这就需要理解质量、重量分布和压力的特性。
However, their focus was not on aerobics, but rather on weight-training programs designed to develop muscular mass, strength, and endurance in their primarily male enthusiasts.
然而，他们的重点并不是有氧运动，而是负重训练项目，旨在培养主要客户男性健身爱好者的培养肌肉质量、力量和耐力等。
Obesity is based on the body mass index, a calculation using height and weight.
肥胖是根据身体质量指数，用身高和体重计算出来的结果。
There are no obvious barriers to the mass production of electric tractors and combine harvesters: the weight of the batteries and an electric vehicle's low-end torque are both advantages for tractors.
大规模生产电动拖拉机及联合收割机不存在任何明显的障碍：电池重量轻和电动车的低端扭矩突出都是拖拉机的优势。
Doctors often assess a patient's risk of coronary artery disease by looking at their body mass index - a measure that takes into account someone's weight and height.
医生通常会评估身体质量以测量病人罹患换冠心病的风险，这样的一种测量方法需要参考病人的体重和身高。
Your pediatrician can tell you your child's body mass index - a formula that considers height, weight, age and gender - at the annual checkup.
儿科医生可以在年度检查的时候告诉你孩子的体重指数——通过一个考虑到身高、体重、年龄和性别的计算公式。
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。
Using about 20 years of height and weight data (to determine body mass index) from two large national surveys for the U.S. and the U.K., researchers made forecasts.In the U.S.
通过20年两次的对美英两国国人身高和体重数据（决定了身体重量的指数）的调查，研究人员做出了这样的预测。
Your family doctor can help your daughter set realistic goals for body mass index and weight based on her personal weight history and overall health.
您的家庭医生可以根据您女儿过去的体重情况和总体健康状况，帮助您女儿设定现实的体重指数和体重目标。
People were also asked how often they exercised, and provided weight and height so that body mass index, or BMI, could be calculated.
参与者还被询问多长时间做一次锻炼，并提供了体重和身高数据，用来计算出他们的体质指数（BMI）。
In today's Audi's the engine hangs in front of the front axle, and obviously bringing the engine back will help with mass centralization and front-rear weight balance.
在今天的奥迪车上，发动机装在前轴前端，而把发动机后置显然会有助于大规模集中和前后轴重量分配平衡。
The amount of angular momentum, say, a spinning skater has depends on both the speed of rotation, and the weight and distribution of mass around the center.
角动量的大小，取决于旋转中的滑冰选手的旋转速度、体重和绕旋转中心的质量分布。
By controlling for individual and environmental influences on weight, such as income and health, they then measure whether food-price changes affect body-mass index (BMI).
如果不考虑诸如收入和健康这些影响体重的个人和环境因素的话，作者估量出了食品价格变动是否会影响体重指数。
The rest of the weight was fat-free body mass, which includes other components such as water or muscle, and is generally not the target of those seeking to lose weight.
其余重量都是无脂身体质量，包括身体的其他组成成分，如水或肌肉，而通常这不是减肥的目标。
The participants lost about 2.5% of their initial weight and 4% of their initial fat mass.
试验者损失了大约2.5 %的初始重量和4 %的初始脂肪块。
We found that food insecurity is associated with a higher body mass index, greater weight gain during pregnancy, and a higher risk for the development of gestational diabetes.
我们发现如果孕期食物无保障，孕妇的体重指数会偏高，体重增加更多，同时患妊娠期糖尿病的风险更高。
Those in large speed-dating sessions instead made choices based on quick and easy-to-assess characteristics such as age, height, body mass index, and weight.
而在大的约会活动中，人们则更倾向于依靠年龄、身高、三维以及体重等简单快速的特征来进行评定。
The task force recommends that children aged 6 to 18 have their body mass index - B.M.I. - measured and, if they are found to be overweight, be referred to a weight-loss program.
该专责小组建议，6岁到18岁的孩子应测量他们的体重指数(b.m.i.)，如果发现他们超重，就应当提及减肥计划。
Are more likely to achieve weight maintenance, have a healthier body mass and composition.
更有可能保持体重并具有更健康的体重和体成分。
And importantly, the same trend held up when the researchers looked at body mass index4 (BMI) a measure that takes height as well as weight into account.
还有一个重要事实：研究者通过观察人体综合指数(BMI)，即将身高和体重综合考虑的一种算法，验证了这一趋势。
Obesity involves a measure of weight in relation to height and is defined as having a body mass index that is 30 or higher.
当体重/身高指数达到30或以上时，即被认为肥胖。
Monday's study from Eastern Virginia Medical School in Norfolk covered 1, 000 people and found that total sleep time decreased as body mass index — a measure of weight based on height — increased.
周一，位于美国弗吉尼亚州诺福克市的东维吉尼亚医学院发布了这份研究。对1000名受试者的研究显示累计睡眠时间和体重指数刚好成反比，体重指数是一种以身高为基准来衡量体重的方法。
Just a 10 percent increase in body mass index, a measure of weight relative to height, can cut a man's real earnings by 3.3 percent and a woman's by 1.8 percent, according to economists.
据经济学家介绍，体重指数(测量体重与身高比例的指标)上升10%，男性的实际收入就会下降3.3%，女性则会下降1.8%。
In addition to the other heart health benefits of blueberries, those fed the low-fat blueberry diet also lost body weight and fat mass compared to those on the high-fat diet.
蓝莓除了给心脏健康带来的好处外，这些喂养以低脂肪和蓝莓的饮食失去的体重和脂肪量比喂养高脂肪食物多得多。
They also found, as other researchers have, that higher body-mass index (BMI), a calculation based on height and weight, was also linked with earlier puberty.
他们同时还发现，正如其他研究人员已经发现的那样，较高的体重指数(BMI)——一项根据身高和体重计算出的指标，同样也跟早熟有联系。
They also found, as other researchers have, that higher body-mass index (BMI), a calculation based on height and weight, was also linked with earlier puberty.
他们同时还发现，正如其他研究人员已经发现的那样，较高的体重指数(BMI)——一项根据身高和体重计算出的指标，同样也跟早熟有联系。
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