preamplifyWiktionary 原文构词拆分pre-前缀Before; physically in front of. · Before; earlier in time; beforehand.+amplify词根/词干词源说明From pre- + amplify.释义（英文）动词 Verb(transitive) To amplify a low-level input signal, producing an output that can serve as the input to a higher-level amplifier.词族相关词（2）preamppreamplification