demonstratorn.
英 'demənstreɪtə | 美 'dɛmən'stretɚ
中文n. 示威者；论证者；指示者；证明者
词根词源
demonstrator (n.)1610s, "one who points out," agent noun in Latin form from demonstrate. From 1680s as "one who uses exhibits as a method of teaching;" 1870 as "one who participates in public demonstrations."
关键词