Manufacturers invariably quote an optimum glide ratio with an angle of attack of 14 degrees and no, or very little, pull on the brakes. But this is in still air.是什么意思_Manufacturers invariably quote an optimum glide ratio with an angle of attack of 14 degrees and no, or very little, pull on the brakes. But this is in still air.在线翻译_英语_读音_用法_例句