今年年初,一艘酷似飞艇的新型飞行器,在美国加利福尼亚州进行了首次飞行。这艘飞行器的耗油量很低,它的运行方式与潜水艇相似,通过排出氦气上升、吸入氦气下降的方式,能像直升机一样垂直起降。新型飞行器全长约70米, Earlier this year, a new airship resembling airships was first flown in California, USA. The aircraft has low fuel consumption and operates in a manner similar to a submarine. It can lift and drop vertically, like a helicopter, by expelling helium and taking helium down. The new aircraft is about 70 meters in length,