shared channel的用法和樣例：
例句
- A condition arising when two or more data stations attempt to transmit at the same time over a shared channel, or when two data stations attempt to transmit at the same time in two-way alternate communication.
當兩個(gè)或多個(gè)數據站想在同一時(shí)間通過(guò)共享信道發(fā)送數據，或兩個(gè)數據站想在同一時(shí)間在雙向交替通信中發(fā)送數據時(shí)產(chǎn)生的一種狀態(tài)。
