adjustment under variable conditions的用法和样例：
- Heating operation experiment of air-source heat pump chiller with refrigerant R410A under variable conditions has been conducted.
- Performance analysis of an air-source heat pump water heater under variable conditions
- Calculation method of the fan speed control for the dust removing system under variable conditions
- A unit specified by a scale, such as an inch, or by variable conditions, such as a day's march.