Channel security is more complex because it depends on several Settings.

通道安全性更复杂，因为它依赖几个设置。

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Although narrowband models of the HF channel have existed for many years, with the development of the HF communication they are not applicable to the complex wideband HF channel conditions.

尽管短波窄带信道模型已经诞生了几十年，但是随着短波通信向宽带化发展，它已经不能适应复杂的短波宽带信道条件。

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The spatial characteristic of wireless communication channel is very complex. The fine simulation of the channel is helpful to design and develop wireless communication net.

无线通信信道的空间特性十分复杂，通信信道的精细仿真对无线通信网络的设计和开发有着重要的作用。

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Besides mixing, Dr Wixforth also showed how SAWs could channel fluids as part of more complex tasks on so-called microfluidic lab-on-a-chip devices.

ECONOMIST: Acoustic microfluidics

As the CMO Council points out in its report, the future requires a new breed of top marketer, one who has the skills, experience and leadership (and I would add, the tools) to be able to continue the advancement of the customer experience across a more complex, multi-channel landscape.

FORBES: Why 2013 Is The Year Of The Marketer