NASA has revealed three concept designs for quiet, energy efficient aircraft that potentially could be ready for flight as soon as 2025.
美國(guó)國(guó)家航空航天局最近公布了三款在未來(lái)2025年人們乘坐的飛機(jī)設(shè)計(jì)圖，這三款飛機(jī)比現(xiàn)在的客機(jī)更安靜、而且更加節(jié)能高效。

Three companies - Lockheed Martin, Northrop Grumman and The Boeing Company - came up with the designs and, at the end of last year, all three won a contract from NASA to research, develop and test their concepts in 2011.
美國(guó)國(guó)家航空航天局去年年底分別與洛克希德 馬丁、諾斯羅普格 魯曼以及波音公司這三家航空巨頭簽訂了飛機(jī)設(shè)計(jì)合同。這三家航空巨頭在接下的2011年，將繼續(xù)進(jìn)行研究、開發(fā)測(cè)設(shè)它們的設(shè)計(jì)方案。

The designs came about after NASA revealed it was aiming to develop a line of "super planes" that are faster, larger, quieter - and burn fuel more efficiently and cleanly than their present counterparts.
美國(guó)國(guó)家航天航空局在合同中要求開發(fā)的新飛機(jī)不僅是更大、更快、更安靜的“超級(jí)飛機(jī)”，而且還要比目前現(xiàn)有的客機(jī)更加省油、綠色節(jié)能。

Now, each of the three companies will spend the rest of this year exploring, testing and simulating their designs in the hope that NASA will choose it for development.
在接下來(lái)的一年時(shí)間里，這三家公司還將多次開發(fā)、論證和測(cè)試完善自己所提交的飛機(jī)設(shè)計(jì)方案，以爭(zhēng)取讓美國(guó)國(guó)家航天航空局最終選中自家的設(shè)計(jì)。