narrow-gate amplifier

例句：

1. 1.This narrow-gate amplifier is very sensitive to interference.
   这个窄门放大器对干扰非常敏感。
2. 2. The narrow-gate amplifier was used in the early stages of radio transmission.
   窄门放大器在无线电传输的早期阶段被使用。
3. 3. The narrow-gate amplifier has been widely used in various fields.
   窄门放大器在各个领域都有广泛的应用。