efficiency noun
ADJ. ruthless | great, high attempts to achieve greater efficiency in the production process | maximum, optimum | low | cost | energy, fuel | mental, physical | administrative, business, economic, industrial, management, operational, organizational, production, productive, technical
VERB + EFFICIENCY achieve | boost, enhance, improve, increase, maximize, promote | decrease, impair, reduce
EFFICIENCY + NOUN drive, measures New timekeeping procedures had been introduced as part of an efficiency drive. | gains, improvements, savings the efficiency gains resulting from improved technology
PREP. with ~ The uprising was put down with ruthless efficiency. | ~ in greater efficiency in energy use
You can also check other dicts: efficiency (English, 中文解释 ), wordnet sense, Collins Definition