Particle number density
[化] 平均密度
🧩 词语组成解析
🗣️ 情景例句
She went to a school-board meeting.
她去参加联合校董会会议了。
These shoes are worn-out.They've lasted a long time.
这些鞋子旧了。已经用了很长时间了。
Of course, the answer is Chinese.
回答当然是汉语。