Focuser
聚焦放大镜, 聚焦装置
🗣️ 情景例句
Thanks, Mrs. Martinelli.
谢谢 ，Martinelli太太。
What's the circulation of this magazine?
这杂志发行量怎么样？
Personally, I'd rather go to the Science Museum.
就我个人而言，我倒想去科技馆。