differential counting rate的用法和样例：
- It makes no difference to the count rate.
- A measurement reported in terms of count rate is peculiar.
- Changes in the beam intensity will produce changes of the count rate.
- This is normal data from a complete blood count as performed on an automated instrument, including an automated WBC differential count.
- Thermal noise counting rate of the EMI 9635 QB type photomeltipliers reduces to 1/4-1/3 of the rate at room temperature.