例句與造句

1. In 1977 Jeffery experimented with an oscillating aerofoil system based on a vertically mounted pivoting wing which flapped in the wind.
2. Control surfaces and a pivoting wing deployed as planned as the missile began its programmed assent-phase roll and pitch maneuver.
3. He also developed a new tripod setup for supporting a sailboat mast and came up with the Wingdex, a pivoting wing for shallow-draft sailboats.
4. It's difficult to find pivoting wing in a sentence. 用pivoting wing造句挺難的