1. A circuit that decreases the difference between the strongest and the weakest signals in a particular range. 
   减小某特定范围内强弱信号之间差别的一种电路。
2. It offers a diverse range of subjects: 47 are currently available at junior secondary and 43 at senior secondary levels. 
   科目的范围非常广泛。现时初中课程有47个科目供学校选择，高中课程则有43个科目。
3. Within each family there is a range of voltages that the circuit will recognize as a high or low level. 
   在每个系列中都有一系列电路将识别为一个高电平或低电平的电压。
4. A limiting action with negligible variation in output in the range where the output is limited. Soft limiting is a limiting action with appreciable variation in output in the range where the output is limited. A bridge limiter is a bridge circuit used as a limiter circuit. 
   一种限制作用，在硬限幅过程中，在受限制的输出范围内输出几乎无变化；在软限幅过程中，允许输出在规定的范围内有适当的变化。桥式限幅器用桥式电路作为限幅电路。
5. In electronics, pertaining to an amplifier or circuit having a frequency respo nse characteristics that is uniform, within defined limits, across a given frequency range. 
   在电子学中，用来修饰或说明一种放大器或电路，这种放大器或电路在一个给定的频率范围内，具有均匀的频率响应特性。

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