FOR THESE SUBORBITAL ENGINEERS, operational safety and low cost are driving their designs rather than attempting to eke out the last bit of performance from the engines, as Big Aerospace personnel might do to fulfill government requirements.

• 对这些次轨道工程师来说，操作的安全性和低成本是驱策他们设计的动力，而不像大型航太公司的人员为满足政府开出的条件，才竭尽所能地从引擎搾出最后一丁点儿性能。