Focusing device
[电] 焦点调整装置
🧩 词语组成解析
[化] 调焦; 聚焦
🗣️ 情景例句
How long are you going to stay here?
您在这里呆多久？
If you want knowledge,you must toil for it.
若要求知识，须从勤苦得。
My name is Li Lei. I'm in Row 1, too. I'm Number 3.
我叫李磊。我也是第一排。我是3号。