Computer simulations that take all of these factors into account could lead to improved designs for folding bikes with small wheels or bikes that carry cargo, Ruina says.
计算机模拟能把这些因素进行综合考量。这能改进设计出可折叠或是能拉货的自行车。
Batteries can account for over 10 per cent of the 45kg to 70kg of equipment that infantry currently carry.
电池占用了目前士兵携带的45 kg到70 kg设备的超过10%的重量。
On really long flights, fuel can account for 40% of a plane's take-off weight, so that around 20% of the fuel is used to carry the rest of the fuel.
在特别长的飞行时,燃料可以占到飞机起飞重量的40%,所以大约有20%的燃料时用来运输其它燃料的。
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