That's why the new WZ-10 attack helicopter was delayed nearly a decade, and why there appear to be two different prototypes for the J-20 stealth fighter.
这正是新WZ - 10攻击直升机推迟了近十年面世的原因，也是J - 20隐形战机有两个不同原型机的原因。
But there was no bomb crater, indicating the strike may have been carried out by a helicopter gunship, or that it had been strafed by a fighter jet.
但那里没有弹坑，说明可能是直升机火力造成的，也有可能是被战斗机低空扫射造成的。
In just a few minutes, your correspondent witnessed a transport plane taking off, three fighter jets roaring overhead and a military helicopter rumbling to life.
就在几分钟内，笔者亲眼目睹了一架运输机腾空而起，三架喷气战斗机在头顶呼啸而过，一架军用直升机在隆隆上升。
Method Questionnaires were carried out among 1 924 military pilots, including pilots of primary trainer, attacker, fighter, bomber, transporter and helicopter.
方法对1 924名军机飞行员进行问卷调查，涉及初教机、强击机、歼击机、轰炸机、运输机及直升机飞行员。
Method Questionnaires were carried out among 1 924 military pilots, including pilots of primary trainer, attacker, fighter, bomber, transporter and helicopter.
方法对1 924名军机飞行员进行问卷调查，涉及初教机、强击机、歼击机、轰炸机、运输机及直升机飞行员。
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