The application must be extremely stable with numerous users logged in simultaneously. Speed must not be sacrificed.
应用程序在多个并发用户访问时必须极其稳定，且不能牺牲速度。
2
The design was intended for flight at Mach 3, but it proved less than ideal at that speed, and the two aircraft together logged less than 2 hours of Mach 3 flight time.