飞场频率管控对飞行安全极为重要。
直升机涡环状态边界的确定对直升机飞行安全具有重要意义。
To predict helicopter vortex ring state boundary is necessary for flight safety.
飞行员和地面控制器之间的通信是非常重要的对航空安全。
Communications between pilots and ground controllers are extremely important to air safety.
飞行员和地面控制器之间的通信是非常重要的对航空安全。
Communications between pilots and ground controllers are extremely important to air safety.
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