amplifiern.
英 'æmplɪfaɪə | 美 'æmplɪfaɪɚ
中文n. [电子] 放大器，扩大器；扩音器
词根词源
amplifier (n.)1540s; agent noun from amplify. Electronic sense is from 1914; shortened form amp is from 1967. Alternative stentorphone (1921) did not catch on.
关键词