Ldr
abbr. 光敏电阻（light dependent resistor）
🗣️ 情景例句
You are a terrific instructor, Jack.
你真是个了不起的教练 Jack。
In vain.
白忙一场。
Doctor, I'm not feeling well, she said. I often feel tired.
“医生，我感到不舒服，”她说，“我经常感到疲倦”。