Focuser
聚焦放大镜, 聚焦装置
🗣️ 情景例句
Yes, she does. She works at home.
是的，她工作。她在家里工作。
I dropped the letter in the mailbox on the corner.
我把信放到角落上的邮箱里。
Yes, we have been interested in new system.
是的，我们对新系统很感兴趣。