一般的，信道既是频率选择性的又是时间选择性的。
Generally the channel is both frequency selective and time selective.
时变色散信道则是同时存在频率和时间选择性衰落的信道。
A time-varying disperse channel is a channel that contain both frequency selective fading and time selective fading.
数字图像在时间选择性衰落信道下传输，难以获得满意效果。
The received image is not satisfactory over time-selective fading channel.
接收端的高速运动或者载频的偏移，会引起信道的时间选择性衰落。
Time-selective Rayleigh fading of channels is caused by Doppler shift and carrier frequency offset.
长时间选择性的培育创造了这些广泛的变种，但是这个过程还是要依赖大自然来产生出所需的基因。
Selective breeding over time created these wide variations, but the process depended on nature to produce the desired gene.
由多径色散及多普勒频移造成的频率—时间选择性衰落是城市移动无线信道的一个重要特性。
The frequency time selective fading resulted from multipath dispersion and Doppler frequency shift is an important characteristic of urban mobile radio channel.
高数据传输速率以及终端的高速移动，导致无线通信信道具有时间选择性与频率选择性两个特征。
High data transmission rates and high mobility give rise to time - and frequency - selectivity in wireless communication channels.
随着时间的推移，选择性适应是一回事。
而时间将会证明加拿大人会因比他们的南部邻居(美国)更精明、更开明而自豪，他们可以抵挡来自选择性保护主义的诱惑。
Time will tell if Canadians, who pride themselves on being more worldly and open-minded than their southern neighbours, can resist the lure of such selective protectionism.
“但是仅仅模仿同伴并非就是成功的秘诀，”肯德尔说，“能够在时间上及学习对象上具有选择性的动物往往更胜一筹。”
"But it is not always a recipe for success to simply copy someone," said Kendal. "Animals are often better off being selective about when and who they copy."
对于我来说，我觉得人们一开始应该尽可能地多读书，当他们开始选择专业的时候，他们应该有选择性的读书，这样他们就会有更多的时间来研究书本。
For me, I think people at first should read as more books as possible, when they start to choose the major, then they should read selectively, so they can have more time to study a book.
最后，只有这样——有选择性的阅读才能让我们有更多的时间去欣赏那些伟大的、著名的书籍之美。
Finally, only in this way -reading selectively can we have more time to appreciate the beauty of the great and famous books.
使用这种方法节省了大量的时间，这种方法与使用橡皮擦工具或魔术棒工具来选择性切断周围的树木和阴影的方法比起来要更好。
Using this method saves a lot of time and looks better compared to trying to selectively cut out around the trees and shadows using the eraser tool or magic wand tool.
高灵敏度、高选择性、快速响应时间等分析优点使得气相色谱-离子阱质谱联用技术(GC -TMS)成为一种首选的检测技术。
Analytical advantages of high sensitivity, high selectivity and rapid response time make gas chromatography-toroidal ion trap mass spectrometry (GC-TMS) a preferred detection technique.
如果需要“选择性加入信息”，平均更新时间是多少?。
If opt-in information is requested, what is the average turnaround time?
该传感器具有选择性好、灵敏度高和响应时间短等特点。
This biosensor has the advantage of high selectivity, sensitivity and short response time.
有机溶剂对迁移时间和分离选择性有一定的影响。
Organic solvent affected the migration time and the selectivity of separation to some extent.
车辆跟驰；人的因素；视觉选择性注意；视觉角；碰撞时间。
Car Following; Human Factor; Visual Selective Attention; Visual Angle; Time to Collision.
讨论了配位基的形状，反应物的构造，碱的类型以及反应时间对反应速率和立体选择性的影响。
The effects of the structure of ligands and substrates, the type of alkali, and reaction time on rate of reaction and stereoselectivity were discussed.
把激光脉宽调整到与吸收颗粒的热弛豫时间一致可以避免热副作用，可对所选细胞产生选择性处理。
Adjusting the pulse width of the laser to the thermal relaxation time of the absorbing construction can avoid thermal side effects and facilitate a selective treatment of the selective cells.
结果与结论所用方法可缩短反应时间，提高反应的选择性和收率，可用于工业化生产。
RESULTS and CONCLUSION The new approach could significantly shorten the reaction time, improve the reaction selectivity and the yield, and it is also suitable for industrial production.
结果与结论所用方法可缩短反应时间，提高反应的选择性和收率，可用于工业化生产。
RESULTS and CONCLUSION The new approach could significantly shorten the reaction time, improve the reaction selectivity and the yield, arid it is also suitable fur industrial production.
化学选择膜作为化学传感器中最为重要的组成部分，直接影响到化学传感器的选择性、稳定性、重现性及响应时间等性能指标。
As the most important constituent of chemical sensor, chemical selective membrane directly affects chemical sensor selectivity, stability, repeating and responsive time, etc.
目的探讨选择性支气管动脉灌注化疗对肺癌治疗的缓解率和缓解时间。
Objective To further study the remission rate and the remission time of the patients with advanced lung cancer treated by selective bronchial arterial infusion.
数值模拟的结果表明：合理选择光辐射波长、辐射曝光时间和曝光剂量，可以选择性的热破坏光老化皮肤中的病损组织。
The results of numerical simulation show the lesion of photoaging skin can be selectively damaged if the wavelength, exposure duration and exposure dose of irradiated ligh are reasonably selected.
但是，对于这样高速率的传输，信道会由于具有不同延迟时间的多条干扰路径的存在而呈现出严重的频率选择性。
However, for such high-speed data transmissions, the channel is severely frequency-selective due to the presence of many interfering paths with different time delays.
结果表明，利用GC-MS法对加氢尾油中多环芳烃进行分析，具有选择性高，响应呈线性，芳烃组分信号不受烷烃干扰，分析时间短和精密度好等优点。
The results showed that the GC-MS had the advantages of high selectivity, rapid analysis, high precision, good linear response, and low interference on PAH signals, etc.
具有灵敏度高，选择性好，响应恢复时间快等优点。
It features high sensitivity and selectivity and fast restored response time.
具有灵敏度高，选择性好，响应恢复时间快等优点。
It features high sensitivity and selectivity and fast restored response time.
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