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...
Moles have powerful forefeet for digging.鼹鼠的前足非常有力，擅长挖洞。Unsightly moles can be removed surgically.不雅观的痣可以手术去除.Moles dug tunnels under the lawn.?鼠在草地下面打洞....
It was the first face-to-face meeting between the two men.这是两人首次当面会晤。Eventually, he came face to face with discrimination again.最终，他又一次遭遇歧视。I deal with customers on the phone and rarely meet them face-to-face.我用电话和客户打交道，...