Optical relay
[电] 光继电器
🧩 词语组成解析
relay
[rɪ'lɛi]
n. 接替人员，替班;传递;接力赛;继电器;
vt. 转播，传达;用驿马递送，使接替;分程传递;
🗣️ 情景例句
Aren't you hungry, Harry?
你不饿吗， Harry？
He alone is poor who does not possess knowledge.
没有知识，才是贫穷。
Perhaps there is an element of truth in both these pictures,
也许，这两种都像都有可信之处。