The channel USES space whether or not a text message is inserted.
这个通道，不管插不插短信进去，它都是存在的。
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。
Tradition water-sealing floor drain just separates the room space with channel by storing water.
传统水封地漏，只靠存水把居室空间和管道隔开。
Tradition water-sealing floor drain just separates the room space with channel by storing water.
传统水封地漏，只靠存水把居室空间和管道隔开。
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