Optron
光导发光元件
🗣️ 情景例句
Hello, Mrs. Herrera. Hi, Carl, how you doing?
你好，Herrera太太，嗨，Carl，你怎么样啦？
What were you doing at about 4 o'clock yesterday afternoon?
你昨天下午在大约4点钟正在做什么？
'You must give up fishing!' my friends say.
“你可别再钓鱼了！”我的朋友们说，