Particle number density
[化] 平均密度
🧩 词语组成解析
🗣️ 情景例句
I love to get away and spend a few days with nature.
我好想离开这里到大自然里呆几天。
The best mirror is an old friend.
老朋友是最好的镜子。
Even he still lives under the illusion that country life is somehow superior to town life.
即使他也仍存有幻觉，好像乡村生活就是比城市生活优越。