Particle number density
[化] 平均密度
🧩 词语组成解析
🗣️ 情景例句
You're still thinking about something to do, aren't you?
你还在想要找点事做， 是吗？
Fall sick and you will see who is your friend and who is not.
困难见友情。
During that time she so gained my aunt's confidence that she was put in charge of the domestic staff.
在此期间，她赢得了姑母的赏识，甚至当上了大管家。