And each design has to fly up to 85 percent of the speed of sound; cover a range of approximately 7, 000 miles; and carry between 50, 000 and 100, 000 pounds of payload, either passengers or cargo.

还有就是要求所有设计的飞行器的速度必须不低于85%音速水平；航程必须达到7000英里；在负载量上无论乘客还是货物必须达到50,000到100；000磅。

youdao