The issue of water emissions can be addressed by designs that enable long-haul aircraft to cruise below 9,000 meters. Such designs could be enabled by using circulation control for high lift and employed at cruising altitude for ride quality.
amp#160;amp#160;amp#160; 水排放的问题可以通过让长途飞机在九千米以下巡航的设计加以解决。可以通过使用高升循环控制来实现这样的设计并且在巡航高度加以运用。随之而来的短途起飞和降落效果也可以改进机场生产效率。