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 have just begun to learn and my serve isn't very good.
我刚刚开始学习，发球不太好。
What time?
什么时候？
Unlike most of his contemporaries in Hollywood, Hart actually knew something of the old West.
哈特与大部分同时代在好莱坞的演员不同，他确实了解西部早期拓荒生活的一些情况。