The airlines have invested enormous sums in new, quieter aircraft.
航空公司投入了大笔资金购买噪音较小的新型飞机。
The X-48B program is part of NASA’s new Environmentally Responsible Aviation Project aimed at developing more fuel efficient and quieter aircraft for the future.
X - 48B计划是美国宇航局的新环境友好航空项目的一部分，这个项目致力为未来于开发燃油效率更高、更安静的飞机。
BAA and the government think that because aircraft are getting quieter and cleaner the extra flights will be bearable.
英国机场管理局以及政府认为，由于飞机的噪音和污染都在降低，额外的航班便将在可允许的范围之内。
We believe it is possible to build an aircraft that uses less fuel, gives off fewer emissions, and is quieter, and we are working on the technologies to create that aircraft.
我们有信心制造出使用更少燃料、排放更少气体、运行更为安静的航天飞机，而我们也正致力于实现这个伟大的目标。
NASA previously invited designs for aircraft that might fly in 2035, with even quieter and more fuel-efficient aims.
美国航天局先前邀请飞机可能在2035年与飞甚至更安静，更省油的目的，设计。
Unlike most other X-Planes, the X-48B isn't designed for supersonic flight; rather, it's meant to study ways to create quieter, more fuel-efficient aircraft.
与大多数其他X -飞机，就X - 48b是不适合超音速飞行，相反，它的目的是研究如何建立更安静，更省油的飞机。
Although the number of residents affected by aircraft noise has decreased sharply over the past two decades, as planes have become quieter, it still affects over 200,000 people (see chart).
在过去的二十年里，飞机飞行逐渐变得安静，受机场噪音干扰的居民人数虽已急剧减少，但仍有20万居民受其影响(见表)。
Although the number of residents affected by aircraft noise has decreased sharply over the past two decades, as planes have become quieter, it still affects over 200,000 people (see chart).
在过去的二十年里，飞机飞行逐渐变得安静，受机场噪音干扰的居民人数虽已急剧减少，但仍有20万居民受其影响(见表)。
应用推荐