efficiency

• n. 効率；有効性；効能

ef-、外に向かう。-fic、する、語源的には事実、効果と同じ。

efficiency (n.)

1590s, "power to accomplish something," from Latin efficientia "efficient power; efficiency; influence" (from efficientem; see efficient) + -cy. In mechanics, "ratio of useful work done to energy expended," from 1858. Attested from 1952 as short for efficiency apartment (itself from 1920).

1. The spa is the last word in luxury and efficiency .

この鉱泉療養浴場は贅沢を尽くし、効果が極めて高い。

2.Revenues from "green taxes "could then be channelled back into energy efficiency .

緑色税から得た収入は、エネルギー効率の向上に振り向くことができます。

3.It was achieved with minimum fuss and maximum efficiency .

ことを半分の労力で達成しました。

4.It doesn 't take much to improve the energy efficiency of your home.

家庭のエネルギー消費を改善することは難しくない。

5.Defrost the fridge regularly so that it works at maximum efficiency .

冷蔵庫に定期的に除霜し、最高効率を発揮できるようにします。