For an initial service, a 10 megahertz-wide band of frequencies will be needed.

初期制动将需要10兆赫兹宽的频带。

《柯林斯英汉双解大词典》

But this approach only allows vibrations within a narrow band of frequencies to be generated, says Mr Rosenthal.

但罗森塔尔说，这种方法产生的震动频率范围很窄。

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The most valuable frequencies of all-those in the 700 megahertz band (channels 52 to 69) -have been auctioned off to mobile phone companies.

这当中最为宝贵的频率—700兆赫段(52到69频道)—已经被诸多移动电话公司竞拍取得了使用权。

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Recently, researchers at the Institute of Neurology at University College London stimulated the brains of human subjects to push the brain toward beta band frequencies associated with focus to study the effects on motor processing, with the hope of helping those with Parkinson's disease.

WSJ: Bionic Brains and Beyond