倍-倍

倍增器

beiˋ zeng ˉ qiˋ

Multiplier, a type of electronic component

倍 | 增 | 器

事半功倍

shiˋ banˋ gong ˉ beiˋ

Achieve a lot with little effort | Double the result with half the effort

事 | 半 | 功 | 倍

事倍功半

shiˋ beiˋ gong ˉ banˋ

Achieve very little despite exerting a lot of effort

事 | 倍 | 功 | 半