2. The aircraft circled round over landing strip . 飞机在着陆跑道上空兜圈子。
3. This sight is a good attempt at the solution of the problems of controlling aircraft guns, and the engineering skill displayed in the design of the prototype is high. 这个瞄准具在试图解决航空武器的控制问题上是一个好的尝试,同时在原型的设计上这个工程师显示了高超的技能。