equalizern.
英 'iːkwəlaɪzə | 美 'ikwəlaɪzɚ
中文n. 均衡器，[电] 平衡器；平衡装置；使相等的东西
词根词源
equalizer (n.)1792, agent noun from equalize. Sports sense attested by 1930; in the U.S. underworld slang sense of "pistol," it is from c. 1900.
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