These extremely high frequencies allow proportionately wider band-width signals to be transmitted.

这些超高频能传送均衡的宽频信号。

属类：行业术语-传媒-电子媒体

This laser beam covers a very narrow range of frequencies .

这种激光束的频率范围很窄。

属类：工程技术-科技英语-

A vacuum is the only perfectly transparent medium; all others absorb some frequencies of electromagnetic radiation.

真空是唯一完全透明的媒质,一切实物媒质都会吸收电磁波谱的一些波段。

属类：自然科学-物理-

To cause beating by superposing waves of different frequencies .

振动叠加不同频率的波以产生拍差,拍音

属类：综合句库--

Methods for the calibration of vibration and shock pick-ups--Primary vibration calibration by laser interferometry at low frequencies

振动与冲击传感器的校准方法激光干涉法低频振动一次校准

属类：行业标准名称-国家标准名-GB/T13823.11-1995

Positive frequencies are produced by anticlockwise rotation and negative frequencies by clockwise rotation

正频率是用逆时针旋转来产生,而负频率是用顺时针旋转来产生。

属类：综合句库--

A DC transmission line is inherently an asynchronous tie that is insensitive to the power angles and frequencies of the interconnected AU systems.

直流线路属于一种对所被联接交流系统的功角和频率不敏感的异步联接。

属类：工程技术-电力英语-

A comparison of termination rate constants and dielectric relaxation frequencies , both measured in dilute solution, is reported in Tables 5. 1 and 5. 2

终止速度常数和介电松弛频率度对比示于表5．1和表5．2中,二者都是在稀溶液中测得的。

属类：综合句库--

ultraviolet radiation: Portion of the electromagnetic spectrum extending from the violet end of visible light to the X-ray region. Ultraviolet (UV)radiation lies between wavelengths of about 400 nanometres and 10 nanometres, corresponding to frequencies of 7.5 ′ 1014 Hz to 3 ′ 1016 Hz. Most UV rays from the Sun are absorbed by the Earth's ozone layer.

紫外辐射:位于电磁波谱中靠近短波或可见光区之短波长端(紫端)外侧的电磁波。由于肉眼看不到,故常称为黑光;但当它投射于某些物表时,可使之发出荧光,或放出可见光。紫外辐射可从高热表面(例如太阳);亦可产生自气体放电管中的原子激发。

属类：自然科学-物理-

Most common form of frequency modulation in which two possible states (one and zero)are transmitted as two separate frequencies

最常用的一种频率调制方式,其中两个可能的状态(1和0)是作为两个离散的频率来传输的。

属类：综合句库--