The Permian event has attracted much less attention than other mass extinctions because mostly unfamiliar species perished at that time.
二叠纪大灭绝事件比其他大灭绝事件受到的关注要少得多，因为那时灭绝的大多是我们不熟悉的物种。
Supporters of home education claim that it is less expensive and far more efficient than mass public education.
家庭教育的支持者声称，家庭教育比大众公共教育成本更低，效率更高。
Data has since revealed that all mass strandings around Australia occur on gently sloping sandy beaches, some with inclines of less than 0.5%.
此后的数据显示，澳大利亚周围所有的大规模搁浅都发生在平缓倾斜的沙质海滩上，有些海滩的倾斜度小于0.5%。
The bigger the animal is, the lower its surface-to-volume ratio; for every ounce of body mass, there is proportionately less surface through which heat can escape.
动物体型越大，其体表体积比越低；躯体每增加一盎司的重量，所能散发热量的表面就成比例减少。
The larger animals require less food per unit mass, more efficiently storing carbon than smaller animals.
较大的动物每单位质量需要的食物较少，却能比小型动物更有效地储存碳。
The researchers found that those children who had less sleep in their earlier years were at greater risk of having a higher Body Mass Index at age seven.
研究人员发现早年睡眠较少的那些七岁的孩子有较高的‘身体质量指数’的风险。
Larger animals tend to use less energy per gram of body mass than smaller ones do, even at rest.
体型大的动物单位体重消耗的热量比体型小的动物更少，甚至在休息时也是如此。
If you lined up all the tablets at the CES and ignored the OS each was running, you'd have a mass display of lots of slates that looked more or less the same.
如果把CES上所有的平板电脑产品排成一行，并忽略其上运行的操作系统，你看到的将是一块块多少有点儿类似的板子构成的一个壮观展示。
In order to achieve interstellar travel, Matloff stresses that less mass and more of a solar push are key.
为了实现星际航行，马特罗夫强调，更轻的飞船质量以及更强的太阳光推力是关键。
Being aerobically fit was far less important than having a normal body mass index in preventing the disease.
有氧健身在预防疾病方面，远不如拥有正常的身体质量指数重要。
Stars with less mass than the sun are smaller and cooler, and hence much fainter in visible light.
质量比太阳小的恒星会比较小和比较冷，几乎不产生可见光。
According to the American Journal of Clinical Nutrition, men with a high muscle mass in their upper arms are 36% less likely to die from any cause of death than those with smaller arms.
据《美国临床营养学杂志》上男性高质量的上臂肌肉有36%的人更容易死于任何死因比那些较小的武器。
But Eric Brewer tells us the price should be less once the technology is finalized for mass production.
但EricBrewer告诉大家，一旦这项技术的产品大规模生产，价格会有所下降。
You’d be stuck contemplating the mass of idling cars, a mental exercise that is much less pleasant than dreaming about a beach and much less useful than mulling what to do once you get off the road.
史默伍德博士说：“人们认为心不在焉是件坏事，但是如果我们在做无聊工作的时候不能出神一下 那生活将会太可怕了。” 明尼苏达大学心理学家、该领域先驱者之一埃里克 科林格认为：“想象一下 如果你的精神不能从交通阻塞中解脱出来，你会在这受困的汽车大军中苦思冥想，智力锻炼没有幻想着海滩来得那么愉快，也没有思考着驶离公路后干什么来得有用。
The insects generally produced less methane, nitrous oxide and ammonia both per unit of body mass and per unit of mass gained than pigs or cattle.
通常情况下，同猪和牛相比，每单位体重或增加每单位体重，昆虫产生更少的甲烷、一氧化氮和氨气。
The higher your peak bone mass, the more bone you have "in the bank" and the less likely you are to develop osteoporosis as you age.
你的估量峰值越高，你的“银行”中就拥有越多的骨骼，而且在你上了年纪后患上骨质疏松症的可能性越小。
Less muscle mass also decreases the rate at which your body USES calories, which can make it more challenging to maintain a healthy weight or lose excess pounds.
减少的肌肉也会降低你的身体消耗热量的速率，这令你保持健康的体重或者减去多余的脂肪变得更具挑战性。
Mice on the smoke diet ate about 23 per cent less but their fat mass kept to similar levels.
处于烟雾中的老鼠节食23%，但是它们的脂肪量仍保持在同样的水平上。
When his team compared the more naturally active children with the less active ones, they were surprised to discover absolutely no difference in their body fat or body mass.
当他的球队相比，更自然的与社会上较积极主动的孩子，他们惊讶地发现自己的身体绝对没有脂肪或体重差别。
In less than a month, someone with the equivalent of a masters degree in biology could probably accomplish the necessary steps to produce enough toxin to cause mass casualties.
不出一个月，一个具备生物学硕士同等学力的人就能够完成制作过程的主要步骤，进而生产出能够造成重大伤亡的剂量。
In the end, a mature lean-production line stops much less frequently than a mature mass-production assembly line.
最后，一条成熟的精益生产线比一条成熟的大批量生产组装线停工次数少得多了。
But Sanders also sees danger ahead as traditional mass media outlets lose readers and viewers to the often less reliable and fragmented new media sites.
但是桑德斯也看到了所面临的危机，传统媒体败给那些通常更为不可靠且片面的新媒体网站，失去了读者和观众。
You're also at greater risk if you're extremely thin (with a body mass index of 19 or less) or have a small body frame because you may have less bone mass to draw from as you age.
如果你相当单薄(体重指数为19或更少)或者身体骨架很小的话，你患上骨质疏松的风险也很高，因为如果这样的话，当上年纪后你的骨量可能会较少而不胜流失。
While better fuel-efficiency is good news for Americans' wallets and less driving good for the country's air, for its highways and mass-transit systems, it is something of a disaster.
虽然，更高的燃油效率能节省美国人的经济支出，少驾车也有利于改善美国的空气质量，但这对美国的高速公路和公共交通系统却可以说是一种灾难。
Stars a little less than that mass are thought to collapse into what are called neutron stars — very dense, dead stars, but not quite so exotic and weird as black holes.
比它小一点的恒星会塌陷为中子星——高密度，无生命的星体，但是没有像黑洞那样那么奇特和不可思议。
But the carbon-footprint benefits of organic foods become less clear over larger distances because of the efficiency of the nationwide distribution systems for mass-produced foods.
但是碳足迹很少的有机食品如果运输到外地，则会失去其优势。因为在全国范围内运输批量生产食品的物流系统效率不高。
Immediately after supernova, if the remnant core has a mass of less than three SUNS, one would expect a blob of degenerate neutron matter to be spinning in the explosion's wake.
在经历超新星后，假如剩下的残核小于三个太阳质量，爆炸的残余物质就将可能演变成旋转着的中子团。
Living in urban areas is more efficient — mass transit is better, walking is easier, you tend to have less stuff, and the housing is less energy-intensive.
因为在城市里我们的生活能更有效率。比方说公共交通设施要更好，行走也更便利，而且人们不会胡乱购置物品，还有住房相对来说也更加高效省能。
Light at night increases mice body mass, apparently by shifting food intake to times when the animals are less active.
夜晚的灯光会让老鼠身体发胖。当这些小动物不那么活跃时，灯光明显改变了它们的进食次数，因而造成体重增长。
Light at night increases mice body mass, apparently by shifting food intake to times when the animals are less active.
夜晚的灯光会让老鼠身体发胖。当这些小动物不那么活跃时，灯光明显改变了它们的进食次数，因而造成体重增长。
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