一九一一年五月,发现“蜉蝣号”飞艇的升力不足.In May 1911 the Mayfly was found to lack sufficient lift to get airborne.桥面横断面可能由于过量的升力而发生扭转.The cross section of a bridge deck may twist as a result of excessive life.这一诱导气流产生正的力矩,该力矩随升力或迎角a的增加而增加...
Cover with a sheet of non-stick baking parchment.用一张不粘烘焙仿羊皮纸包上。I found corn husks and parchment paper in her house.我在她家里发现了玉米壳和羊皮纸....old manuscripts written on parchment.写在羊皮纸上的古老手稿...an old lamp with a parchment shade....