translation.en: In the airplane business, it's again a similar story where the first 20 percent fuel saving is free, as Boeing is now demonstrating in its new Dreamliner.
translation.zh: 在航空业务方面，情况也是这样的。 最初的节省的20%的燃料需要投入资金 比如像现在波音公司新的梦幻客机