求翻译：建国初期阶段，中国直升机主要作为装备军队使用，对于直升机飞行员的培训也集中在军队内部飞行院校进行。而直升机的应用在警务、抢险救灾等领域几乎为空白，由于中国长期对低空进行管制，私人飞行始终未能有效展开。是什么意思？

The early stages of the founding of the Chinese as the main equipment of the army helicopters used for training helicopter pilots are also concentrated within the military institutions to conduct the flight. The helicopter used in police, disaster relief and other areas is almost empty, because of C

At the beginning of the founding phase, China helicopter main As an equipment for use by the army, helicopter pilot training institutions are also concentrated in the armed forces for internal flights. In the case of helicopters and applications in areas such as police, rescue and relief work almost

The early years of the new nation stage, the Chinese helicopter mainly uses as the equipment army, also concentrates regarding helicopter pilot's training in the army interior flight colleges and universities carries on.But the helicopter application in domains and so on police service, emergency di

Early stage, Chinese helicopter primarily used as equipment the army, for training helicopter pilots also focus on the military flight Academy. Helicopter applications in areas such as police, emergency disaster relief almost blank, because Chinese control long-term on low-altitude, private flights

Found the state on initial stage, the Chinese helicopter mainly uses as equipping the army, the training of the helicopter pilot concentrates on the army's flying in the universities and colleges to go on too. And the application of helicopter is nearly the blank in the field of police service, doin