Since 1914, scientists have known that birds flying in formation—a V-shape—expend less energy.
自1914年以来，科学家们已经知道，以V字形队形飞行的鸟类消耗的能量更少。
They expend less energy because-just as you may have always suspected-they simply need fewer strides to cover the same ground.
他们消耗的能量少只是因为他们走相同的长度迈了更少的步子。
They expend less energy because-just as you may have always suspected-they simply need fewer strides to cover the same ground.
正如你怀疑的一样，他们消耗更少的能量是因为他们用更少的步子就能走一样远的路。
Not to be outdone, Lockheed Martin's HULC model USES robotic leg braces that allow wearers to carry 200-pound loads and expend less energy on grueling tasks.
而不甘示弱的洛克希德·马丁公司也推出了机械下肢强化式的HULC模型，它能让穿戴者毫不费力的随身携带重达90公斤的重物，并轻松应对更繁重的任务。
Since 1914, and a seminal paper by a German researcher called Carl Wieselsberger, scientists have known that birds flying in formation—a V-shape, echelon or otherwise—expend less energy.
1914年，一位名叫卡尔▪维塞尔斯伯格的德国研究员发表了一篇具有重大意义的论文，科学家们从中得知，鸟类在飞行的时候排成V字、梯形或倒过来时，会节省体力。
Since 1914, and a seminal paper by a German researcher called Carl Wieselsberger, scientists have known that birds flying in for mation—a V -shape, echelon or otherwise—expend less energy.
1914年，一位名叫卡尔▪维塞尔斯伯格的德国研究员发表了一篇具有重大意义的论文，科学家们从中得知，鸟类在飞行的时候排成V 字、梯形或倒过来时，会节省体力。
Cars must carry their energy and expend energy to carry it, so the less weight per unit of energy, the better.
汽车必须携带能量而这本身就需要消耗能量，因此单位能量的重量越低越好。
Cars must carry their energy and expend energy to carry it so the less weight per unit of energy the better.
汽车必须携带能量而这本身就需要消耗能量，因此单位能量的重量越低越好。
I think there's a general principle at work here: the less energy people expend on performance, the more they expend on appearances to compensate.
我想这是工作中的一个一般原则：人们在工作表现上花费越少，就会在外形上花费的越多来弥补。
But that bear was following the wisdom natural selection had programmed in its genes: food that is high in proteins and sugars is good for you, and the less energy you expend getting it, the better.
可那头黑熊是按照自然选择在它基因中种下的智慧来采取行动：富含蛋白质和糖的食物非常有益，而且获取食物消耗的能量越少越好。
But that bear was following the wisdom natural selection had programmed in its genes: food that is high in proteins and sugars is good for you, and the less energy you expend getting it, the better.
可那头黑熊是按照自然选择在它基因中种下的智慧来采取行动：富含蛋白质和糖的食物非常有益，而且获取食物消耗的能量越少越好。
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