F number
焦距比数
🧩 词语组成解析
🗣️ 情景例句
Oh, yes. It's definitely worth reviewing.
噢 是的 。它着实值得评论。
Through obedience learn to command.
只有学会听命于人，方能学会向人发号施令。
It's odd that they didn't reply our letter.
他们没有给我们回信，这真奇怪。