ef‧fi‧cient S3 W3 / ɪfɪʃ ə nt / 形容词

if someone or something is efficient, they work well without wasting time, money, or energy 反义词 inefficient :

a very efficient secretary

an efficient use of land

Lighting is now more energy efficient .

— efficiently 副词

COLLOCATIONS

副词

extremely/highly efficient The factory is modern and highly efficient.

efficient + NOUN

an efficient way Email is an efficient way of contacting a large number of people.

an efficient method The railways used to provide a cheap efficient method of travel.

an efficient means The tram is a very efficient means of transport.

an efficient system We need a more efficient system for collecting money.

an efficient service We aim to provide our clients with an efficient and friendly service.

the efficient use of something We must work towards the more efficient use of all natural resources.

the efficient operation of something The law must protect investors without interfering with the efficient operation of the market.

NOUN + efficient

energy/fuel efficient (= not wasting any fuel or energy ) an energy efficient heating system

cost efficient (= costing or spending as little as possible ) The larger a firm becomes the more cost efficient it can become.