求翻译：字显示（最大显示数必须为999），能自动显示小数点和单位。通过按键输入要求的电阻值实现自动电阻筛选功能，通过发光二极管和蜂鸣器实现声光指示。通过设计，完成了基本的要求和部分发挥要求。是什么意思？

Character display (maximum number of displayed must be 999), to automatically display the decimal points and units. Resistance values by pressing the input requirements for automatic electrical resistance filter, achieved through LEDs and buzzer sound and light direction. By design, complete the bas

The character demonstration (biggest demonstration number must be 999), can demonstrate the decimal point and the unit automatically.Through pressed key input request resistance value realization automatic resistance screening function, through light emitter diode and buzzer realization acousto-opti

Character display (maximum number of displayed must be 999), to automatically display the decimal points and units. Resistance values by pressing the input requirements for automatic electrical resistance filter, achieved through LEDs and buzzer sound and light direction. By design, complete the bas