The improvement in water quality after the new filtration system was installed was measurable within weeks.
安装新过滤系统后，水质在几周内就有了可测量的改善。
Urban planner Grace Ibe advocates for congestion pricing, arguing that charging drivers a fee to enter city centers during peak hours reduces traffic and funds public transit improvements.
From a Cross-Text Connections question · Craft and Structure
While wind turbine blade length has roughly tripled over the past three decades, the primary driver of falling wind energy costs has actually been improvements in predictive maintenance software, which reduces costly unplanned downtime far more than blade length increases alone would predict.
From a Central Ideas and Details question · Information and Ideas
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
Which choice best defines “improvement”?
A — The act of making something better. “improvement” means the act of making something better.
Which word means “the act of making something better”?
C — improvement. “improvement” means the act of making something better.
improvement — the act of making something better. In Chinese: 改进，改善.
improvement is pronounced /ɪmˈpruːvmənt/.
The improvement in water quality after the new filtration system was installed was measurable within weeks. (安装新过滤系统后，水质在几周内就有了可测量的改善。)
enhancement, advancement, refinement — all close in meaning to improvement (the act of making something better).
deterioration, decline — each the opposite of improvement (the act of making something better).
Yes. improvement 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.