I wanted to have a horizontal level, a vertical level, and a circularlevel.
我想有一个横向的水平，垂直的水平，和一个圆形的水平。
2
Instead of using wings, the coleopter employed a circular extension serving as the outer part of the jet engine while helping the aircraft achieve level flight, as well as vertical ascent and landing.
环翼机没有尾翼，而是采用一个延伸的圆形作为外部引擎，帮助飞机完成水平飞行和垂直起飞降落。
3
The easier level of the challenge requires flights of 90 seconds and a landing on a small, flat circular pad.