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。
Ocean channel is such a complex environment that it varies in space, time and frequency.
海洋水声信道是一种极其复杂多变的时-空-频变参信道。
Adopting complex wind channel technic for improving the heat transfer.
采用复合风道技术，增强散热效果。
Adopting complex wind channel technic for improving the heat transfer.
采用复合风道技术，增强散热效果。
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