例句與造句

1. Much more increase of maximum lift - to - drag ratio can be obtained with a forward - swept main wing with a small sweepback angle leading edge
   主機翼前掠角較小時，鴨翼改善和提高升阻比的效果比較明顯。
2. It's difficult to find sweepback angle in a sentence. 用sweepback angle造句挺難的