OFDMA is based on the idea of frequency-division multiplexing, which is a method to transmit multiple data streams over a channel.
OFDMA是根据频分多路传输系统的思想，这是一种在一个频道上传输多个数据流的方法。
LTE splits the channel into two parts using frequency-division multiplexing, so the download and upload speeds are better balanced.
LTE则利用频分多路传输系统把频道分成两个部分，所以，下载和上传的速度得以更好地平衡。
In the malicious attack statement, two kinds of attacks, SQL injection and middleware channel multiplexing, are hard and heavy.
在恶意攻击语句中，SQL注入和中间件通道复用两种攻击是难中难，同时也是重中重。
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