The plane is an eight-seater with twin propellers.
这是一架有八个座位的双螺旋桨飞机。
Do twin propellers turn inward or outward when going ahead?
双螺旋桨在向前推进时向内旋还是外旋？
Powered by twin propellers connected to a pedal belt, the mini-sub can reach speeds of 8 kilometers an hour and can reach depths of 6 meters.
由连接在脚踏带上的双螺旋桨提供动力，潜艇的时速可达到8公里，并能下潜至6米深。
Powered by twin propellers connected to a pedal belt, the mini-sub can reach speeds of 8 kilometers an hour and can reach depths of 6 meters.
由连接在脚踏带上的双螺旋桨提供动力，潜艇的时速可达到8公里，并能下潜至6米深。
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