The rescue helicopter made another sweep over the bay.
救援直升机在海湾上空又搜索了一遍。
The helicopters appeared as two black dots on the horizon.
直升机像两个小黑点出现在地平线上。
Stay well away from the helicopter when its blades start to rotate.
直升机的螺旋桨开始转动时，尽量离远点儿。
A helicopter was scrambled to help rescue three young climbers.
直升机接到命令，紧急起飞前去营救三个登山的年轻人。
The helicopter was already fuelled and ready to go.
直升机已加好油，准备起飞。
The helicopter rose into the air.
直升机升上了天空。