Photoelectric relay
[电] 光电继电器
🧩 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
It was a pretty dumb thing to do.
做那件事真傻。
The lion is not so fierce as he is painted.
狮子没有画上的凶猛。
Yes. You can help me do the shopping.
当然可以。你可以帮我一起选。