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
It's good to see you so happy.
能看见你如此高兴 ，太好了。
So I've heard.
我听说是这样。
A young man sees a sunset and, unable to understand or to express the emotion that it rouses in him,
一个年轻人看到日落，由于无法理解和表达日落在他心中唤起的激情，