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'm listening.
那就说吧。
David must figure on at least seventy strong men for support.
戴维至少须把七十个壮汉的协助计算进去。
It has a span of 4,260 feet.
桥长4，260英尺。