equalizer
/ˈiːkwəlaɪzə(r)/(亦作 -iser)
noun
1- a thing which has an equalizing effect使平等者; 使相等者：
education is the great equalizer.
教育是伟大的平等使者。
1.1
- a goal that levels the score in the game（比赛中）拉平比分的得分。
1.2
- N. Amer. informal a weapon, especially a gun〈北美, 非正式〉武器（尤指枪）。
1.3
- Electronics a passive network designed to modify a frequency response, especially to compensate for distortion【电子】均衡器。