acceleration
/əkˌseləˈreɪʃn/
n.
标准词条
CET-4
一句话记住
加速;加速度
释义与例句
n.
加速;加速度
the rate at which the speed or velocity of an object changes over time
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The car's acceleration from 0 to 100 km/h takes 6 seconds.
这辆车从0加速到100公里每小时需要6秒。
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Gravity causes a constant acceleration of falling objects.
重力使下落物体产生恒定的加速度。
展开其余 1 条例句
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The new policy led to an acceleration in economic growth.
新政策推动了经济增长的加速。
词源与构词
记忆钩子
ac(加强)+ celer(快,同 celerity 敏捷)+ ation → 使变快的过程 → 加速
词族与关联词
词族(同一词根派生出的不同词性或形式)
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accelerate 加速;促进动词原形,去掉名词后缀 -ion。
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accelerating 加速中的现在分词 / 形容词形式。
同义词
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speeding up 加速speeding up 是通俗说法,acceleration 是正式或科技术语。The train is speeding up as it leaves the station. 火车驶离车站时正在加速。
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quickening 加快;加速quickening 多用于抽象事物的加速,acceleration 可用于具体或抽象。There has been a quickening of interest in green energy. 人们对绿色能源的兴趣正在加快增长。
反义词
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deceleration 减速deceleration 是 acceleration 的直接反义词,加否定前缀 de-。The deceleration of the rocket was smooth and controlled. 火箭的减速平稳且受控。
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slowing down 减速;放慢slowing down 是通俗说法,与 acceleration 语义相反。The economy is slowing down after years of rapid growth. 经过多年的快速增长,经济正在放缓。
常见搭配
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rapid acceleration 快速加速The sports car is known for its rapid acceleration. 这款跑车以其快速加速而闻名。
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acceleration of gravity 重力加速度The acceleration of gravity is about 9.8 m/s². 重力加速度约为9.8米每平方秒。
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economic acceleration 经济加速增长The country has experienced strong economic acceleration. 该国经济出现了强劲的加速增长。