无穷级数的收敛性与发散性与此概念有关.Convergence and divergence of infinite series depend upon this concept.我们用一块负透镜,它将使光线发散一些.We introduce a negative lens which will diverge the rays a bit.高辐射功率的光束会有高的发散度.A beam of high radiant power wil...
He lazed about all day.他闲散地过了一整天.Fred lazed in an easy chair.弗雷德优哉游哉地躺在安乐椅上。We lazed away the summer on the beach.我们在沙滩上打发了夏天的时光。They lazed around the pool in the afternoon.他们下午在游泳池里消磨。They used the swimming-pool, rode, ...