For an initial service, a 10 megahertz-wide band of frequencies will be needed.初始服务需要10兆赫宽的频带。Of an electronic circuit or device; having an output proportional to input; amplifying or attenuating all frequencies equally....
"The police are here," she said in a low voice.“警察在这里，”她低声说。She spoke in a low voice, always without inflection.她低声说话, 总是声调平平无抑扬变化.Though they talked in a low voice, they could be heard distinctly.他们谈话的声音虽然很低, 但他们说的什么是能听...
I found this driftwood on the beach.我在海边发现这根漂流木。The sound seemed to come from some driftwood close at hand.这声音好象来自近处漂来的木头上....a piece of driftwood which he used as a paddle.他用作桨使的一块浮木My son found a piece of driftwood thi...