characteristic life

• 寿命特性

characteristic life的用法和样例：

例句

1. The paper derives out the proper power supply voltage of city road lighting according to the illuminance and life span character at different voltage level.
   摘要根据路灯在不同电压下的照度及寿命特性，推导出城市道路照明灯具的最佳供电电压。