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estimate可以作为动词,也可以作为名词。estimation只能作为动词,当二者为名词时,都有“估计”的意思。如何区别呢?
比如经常说的“x的估计值”the estimate of x,那什么时候用estimate的名词,什么时候用estimation呢?
Linda的email解释最权威
The word "estimate" can be used both as a noun and a verb. For example, as a noun, "I will give you an estimate on the amount of time it will take to complete this job". As a verb, "I will estimate the time it will take to complete this job".
"Estimation" is usually used only as a noun. It is the act or process of estimating. For example, "The amount of time it will take to complete this job is approximately 4 hours. This is only an estimation of the time. The job could take longer." or, This is only an estimate of the amount of time.
综上所述,当都作为名词的时候,estimate专指结果,而estimation指过程(process of estimating)。
ex:
estimate of x
x的估计值
estimation of x
估计x(的过程)
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