您要查找的是不是：
- initial inversion (粒子数)初始反转
- 数to count
- 粒子particle
- 基态振动能级的各转动能级的粒子数可能因幅射而减少。The rotational levels of the ground vibrational level may be depopulated by radiation.
- 行数linage
- 页数pagination
- 有数know exactly about sth.
- 数位digital
- 数个couple
- 为数amount to
- 可数名词countable
- 份数umber
- 数数spillikin
- 磁粒子数magnetic particle number
- 热粒子数thermal population
- 粒子数差population difference
- 临界粒子数threshold population
- 蒸发粒子数number of evaporation particle
- 中性粒子数neutral particle population
- 动态粒子数dynamic particle population
