直译是frequency range但最好用frequency band(s)有例句：同时，由于ITU为TDD技术在全球都划分了统一分配的频段，而TD-SCDMA是TDD技术的惟一标准，这就使得TD-SCDMA在全球商用成为可能。Moreover, as the ITU has allotted worldwide frequency bands for unified-allocation for TDD, and TD-SCDMA is the only standard for TDD, this makes global commercialization of TD-SCDMA possible.所设计的软硬件接口非常适合在ISM频段的无线通信系统中应用。The design is very suitable for wireless communication systems which work in ISM frequency band.小波分析能将信号划分到不同频段内，实现微弱故障信号的分离和提取。The wavelet analysis can divide signal into different frequency bands and carry out inchoate signal decomposition and extracting.另外，低频段直接low frequency，高频段high frequency但当波长较长，声透镜的“波状效应”起作用时，低频段会发生怎样的变化呢？But what happens at lower frequencies, when the “wave model” takes over due to the longer wavelengths?泡沫铝板后设置一定的空腔深度,可获得在中高频段较宽频带的吸声性能A considerable wide absorbing band in the mid and high frequency can be obtained when an air space is added behind an aluminum board.
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