state boundary
美
英 
例句
A reasonable criterion of vortex ring state boundary for helicopter is acquired based on model rotor tests.
通过模型旋翼试验得到了合理的直升机涡环边界判据,并由此计算得到了直升机通用涡环状态边界。
We crossed the state boundary at midnight.
我们在午夜走过了州界。
Flight Test Investigation of Helicopter Vortex-Ring State Boundary
直升机涡环状态边界的飞行试验研究
Helicopter Vortex-Ring State Boundary and Flight Safety
直升机涡环状态和改出