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
Who is it?
谁呀
Karl must concentrate on his work.
卡尔必须集中精力于自己的工作。
Here you are. Put them on, please. You must look after your clothes.
给你们，穿上吧！你们要好好保管你们的衣服。