养信鸽是他的业余爱好.Keeping carrier pigeons is his hobby.剑桥发出了召唤, 他象一只归来的信鸽似的作出响应.Cambridge had called; he had responded like a homing pigeon.一只信鸽被放出去递送消息.A homing pigeon was sent forth to carry the message....
Two phase - shift - networks of frequency discriminator are given circuit and layout examples.本文较详细地分析了鉴频器用移相网络的特性和集成化难易点.Quartz crystal, crystal oscillator, ceramic resonator, ceramic filter, saw filter, ceramic discrim...
We're dismal enough without conjuring up ghosts and visions to perplex us.用不着招神现鬼来缠我们,我们已够惨的啦.This problem is hard enough to perplex even the teacher.这个问题确实很难,以至于老师都迷惑不解.I have no wish to perplex the issue.我不想使问题复杂化...