Multiple network transmissions overlapping in the physical channel, resulting in garbled data and necessitating retransmission.
多个网络传输重迭发生在同一物理信道上，它导致数据被破坏，因而必须重传。
A synthetic third channel was created to construct this dramatic new composite of the overlapping galaxies from two color image data in the Hubble Legacy Archive.
该图是根据哈勃历史资料中的两张彩色照片，通过第三条人工影像通道合成的。
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