在许多应用场合,波动的直流电是讨厌的.In many applications a fluctuating DC current is undesirable.他是个情绪波动的演员(演得好坏由心情而定).He's avery temperamental player, ie plays well or badly accordingto his mood.他们波动的回声中带有一种难言的悲哀.In their echoes, t...
东亮铝银浆是进口产品的代替者,国内同行的领航者.Dongliang Aluminium is not only the substitute of imported products market leader in mainland China.“我们总是不得不为那些优秀的球员寻找代替者, ”曼联经理说.We have had to replace good players time and time again, said the ...