Focusing device
[电] 焦点调整装置
🧩 词语组成解析
[化] 调焦; 聚焦
🗣️ 情景例句
It would be a great business if you could do that.
假如你能办到那样的话， 可是一笔大生意。
Empty vessels make the greatest sound.
空桶响声大。
What is more, this information line operates 24 hours a day.
而且，这种"问讯线路每天工作24小时。