An efficient public transit system can significantly reduce traffic congestion and air pollution in urban areas.
高效的公共交通系统可以显著减少城市地区的交通拥堵和空气污染。
While battery capacity in electric scooters has roughly doubled over the past five years, the primary driver of their increased range has actually been improvements in regenerative braking systems, which recover energy during braking far more efficiently than capacity increases alone would predict.
From a Central Ideas and Details question · Information and Ideas
Data scientist Hanna Voss argues that predictive policing algorithms allow police departments to allocate patrol resources more efficiently by identifying areas with statistically higher crime likelihood.
From a Cross-Text Connections question · Craft and Structure
Which choice best defines “efficient”?
B — Productive without waste. “efficient” means productive without waste.
Which word means “productive without waste”?
A — efficient. “efficient” means productive without waste.
efficient — productive without waste. In Chinese: 高效的.
efficient is pronounced /ɪˈfɪʃnt/.
An efficient public transit system can significantly reduce traffic congestion and air pollution in urban areas. (高效的公共交通系统可以显著减少城市地区的交通拥堵和空气污染。)
productive, streamlined, economical — all close in meaning to efficient (productive without waste).
inefficient, wasteful — each the opposite of efficient (productive without waste).
Yes. efficient is on the SAT Prep Basic list — the everyday academic words the SAT assumes you already have. The Digital SAT does not test vocabulary in isolation; words like this one are tested through Words in Context questions, where you choose the word that completes a passage most logically and precisely.
ef(come out)+fic(do)