在这里的研究中(同样来自于《纽约观察家》的文章)，惠普将所有的160台PC更换为新型号，花了大约五倍的价钱——还有两吨重的电子垃圾。
In this case study (also from the Observer article), HP replaced all 160 PC's with newer models for about five times as much money — with two tons of e-waste.
所有的这些都是给飞机制造商的难题，他们往往习惯于决定在同样的机型上加载竞争型号的发动机。
All this is difficult for aircraft-makers, who are used to being able to hang competing engines off the same wing.
同样的平台上还可以生产其他型号的汽车。
But the same platform can also be used for anything from a people mover to a delivery vehicle.
应用推荐