F-number
n. 数, 光圈数
🧩 词语组成解析
🗣️ 情景例句
It's a good investment.
这是一项好投资。
She insists that it doesn't make any difference to her.
她坚持对她没有任何差别。
I love this movie. I have seen it ten times.
我太喜欢这片子了！看了十遍了，我！