propellant injection的用法和樣例：
例句
- Piezo Actuators are key components of piezoelectric fuel injection systems in diesel and gasoline engines.
壓電致動器是在柴油和汽油發動機中壓電燃料注入系統的重要元件。 - Fuel is injected by the latest generation of High Precision Direct Injection, and the turbocharger features variable intake geometry for maximum efficiency.
燃料注入由高精度新一代直噴式，渦輪增壓器的功能和最高的效率為可變進氣幾何。
