- 1
To decelerate is to go slower. We use it most about vehicles: a car decelerates when the driver lifts off the gas or uses the brake. Planes, trains, and bikes can decelerate too. Scientists and engineers like it as a clean opposite of accelerate. Ordinary drivers more often say slow down. People also stretch it: sales, growth, or an economy can decelerate when they are still moving, just not as fast as before. It does not mean stop — only less fast than a moment ago.
減速
組成Late 19th century: de- (“the opposite”) + (ac)celerate. Built as a partner to accelerate.
同家族的字
- acceleratedecelerate was formed as its opposite
- decelerationthe noun: the slowing itself
- accelerationthe matching “speeding up” noun
原始詞典資料3 筆記錄
以下是外部詞典記錄的用法，原文照列，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
decelerateverb/diːˈsɛləɹeɪt/
- 1
To reduce the velocity of something.
- In May, for example, the Illinois Central RR. introduced the long-expected streamline version of the Panama Limited, with diesel haulage, cutting the time over the 921 miles between Chicago and New Orleans by 2hr. to 18hr. each way—the fastest on record—but decelerated other trains over the same route.
- The S.D.R. [Somerset & Dorset Railway] could not adhere to this schedule, and had to decelerate the service, but the original timings were restored when the M.R. and L.S.W.R. leased the S.D.R.
- 2
To reduce the rate of advancement of something, such as a disease.
- 3
To go slower.
- One of the disadvantages of increasing intermediate stops is that, as we have pointed out already, certain prestige trains have to suffer, notably the "Cornish Riviera Express", slowed 15min to Plymouth by stops at Taunton and Exeter; the "Torbay Express", decelerated 18min by stops at Reading, Westbury, Taunton and Newton Abbot; and the "Bristolian", which adds 14min in order to allow for a Bath stop and an increased load.
資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。