One reason this is hard is that radio telescopes must chop the spectrum into fine portions to study it, like tuning into a signal on a car radio.
研究工作进展困难的一个原因是，正如汽车收音机的调频一般，射电望远镜必须把光谱按照波段分成易于研究的片段。
Often, when we are at one end of the spectrum, it's hard to remember the other end.
常常，当我们处在一个极端的时候，我们很难回忆起另一个极端。
This variability has led many people to think of it as a spectrum of symptoms rather than a single, clear-cut syndrome. And that variability makes it hard to work out what causes it.
这种多变性令很多人认为它的症状多样而不是单一明确的，这种多样化加大了对其病因的研究难度。
Through collecting vibration signal and analyzing it in the frequency domain in the condition of changing parameter cutting, a single self power spectrum is hard to detect tool breakage effectively.
在变切削参数的加工工况下，通过对振动信号的采集和频域处理，发现采用单一的自功率谱方法难以有效检测出刀片破损。
The PTAIS is used to watch and record aim process real time, and by relevant design of soft and hard, complete spectrum prismatic imaging of aimer's aim process.
图像摄取分系统，完成在现场实时观察记录瞄准手的瞄准过程，并通过相应的软硬件设计，实现操作手的瞄准过程光谱分光成像。
The hard X-ray scintillation spectrum and its space distribution are measured. The relation between hard X-ray intensity, pressure of filling gas and toroidal current is discussed.
测量了硬x射线闪烁谱及其空间分布，讨论了逃逸电子产生的硬x射线强度与充气压强、环电流、纵向磁场之间的关系。
This product can enhance the performance of a broad spectrum of hard surface cleaner formulations for use in household, institutional, automotive, avionic, food, hygiene and industrial applications.
该产品可加强用于硬表面清洁产品的效能，用途十分广泛，包括家居护理、工业清洗、汽车清洗、飞机清洗和食品卫生方面。
This paper introduces the application of thermoluminescence dosimeter(TLD) which composed by TLD3500 reader and GR100M chips on the measurement of hard Xray pulse energy spectrum.
介绍了TLD-3500热释光读出器和GR-100M型热释光剂量片构成的探测器在脉冲硬X射线辐射参数测量中的应用。
But it's really hard to achieve rapid tuning, wide free spectrum range (FSR) and low insert loss simultaneously.
由于受到工艺的限制，过去很难同时实现滤波器的快速调谐、很宽的动态范围以及很低的损耗等特性。
But it's really hard to achieve rapid tuning, wide free spectrum range (FSR) and low insert loss simultaneously.
由于受到工艺的限制，过去很难同时实现滤波器的快速调谐、很宽的动态范围以及很低的损耗等特性。
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