1.
A place for helicopters to land and take off.
直升飞机场用于直升飞机着陆或起飞的地方
2.
It was not long before a helicopter arrived on the scene,
不久，一架直升飞机飞抵飞机失事现场，
3.
A helicopter soon arrived on the scene to rescue the survivors.
一架直升飞机很快飞抵出事现场，搭救幸存者。
4.
During the Korean War, helicopters flew into battle areas to rescue wounded soldiers.
在朝鲜战争中，直升飞机飞进战场营救伤员。
5.
helicopter flight dynamics
直升飞机飞行动力学
6.
It was not long before a helicopter arrived on scene to rescue the survivors of the plane crash.
不久，一架直升飞机飞到现场，来营救飞机失事的幸存者。
7.
The helicopter flew up vertically
直升机垂直向上飞起。
8.
To travel by helicopter or transport(someone or something) by helicopter.
用直升飞机乘直升飞机飞行或用直升飞机运载（人或物）
9.
helicopters and parking apron equipment;
直升飞机及停机坪设备；
10.
helicopter rigid frame system
直升飞机机身硬架系统
11.
straight-in approach
(飞机) 直线进场
12.
A jet flies much faster than a helicopter.
喷气飞机比直升飞机飞得快得多。
13.
It was not long before a helicopter arrived on the scene to rescue the survivors of the plane crash.
不久一架直升飞机来到了现场搭救那次飞机失事的幸存者。
14.
The airplane zoomed over the top of the mountain.
飞机陡直上升，越过山顶。
15.
helicopter autopilot
直升飞机自动驾驶仪
16.
Another helicopter was shot down.
又一架直升飞机被击落。
17.
HELP (Helicopter Electronic Landing Path )
直升飞机电子着陆系统
18.
A helicopter is used to install a guide wire.
直升飞机用来设置导线。