tandem airscrew

例句：

1. 1. Theaircraft has a tandem airscrew system that allows for smoother takeoff and landing.
   这架飞机有一个双头螺旋桨系统，可以让起飞和降落更加平稳。
2. 2. The engineers were taskedwith replacing the old tandem airscrew with a more efficient model.
   工程师们被指派用更高效的模型替换旧的双头螺旋桨。
3. 3. Thepilot had to make a quick decision onwhether to use the tandem airscrew or the conventional propeller.
   飞行员必须迅速决定是使用双头螺旋桨还是传统的螺旋桨。