Focal length
[计] 焦距\\n[化] 焦距
📖 牛津释义
focal length
(also focal distance), distance between the centre of a mirror or a lens and its focus 焦距.
🧩 词语组成解析
focal
['fəukəl]
adj. 焦点的，有焦点的;集中在点上的;病灶的，病灶性的;
🗣️ 情景例句
I am on speaking terms with him.
我和他只是泛泛之交。
They teach you English in an intensive course lasting just a week.
他们用一周的时间教速成英语课程。
Let me pick it up for you.
我替你捡起来吧。