admittances of a first-order system的用法和样例：
- The price of a second - class ticket is half that of a first class.
- This paper presents a method for estimating harmonic admittances of the induction motor used for the sensorless monitoring of a mechanical system driven by the motor.
- A practitioner of a system of logic.
- A toss of a coin decided who should play first.
- The cake we made was somewhat of a failure.