When network traffic is light, computers can simply wait for silence on the carrier, and then transmit their data.

当网络流量较小时，计算机可以简单地等待载体上的静默，然后传输它们的数据。

But, as network traffic increases, the probability that two computers will attempt to write data at the same time also increases.

但是，随着网络流量的增加，两台计算机同时尝试写入数据的可能性也会增加。