估算的英文：
estimation
estimate

参考例句：

It is only an estimate.
这只是一个估算值。

I make some rough calculation on the back of an envelope.
我在信封背面做了一些估算。

Estimable assets; an estimable distance.
可估计的财产；可估算的距离

Sales of the product have been seriously hurt by the adverse publicity
汽车尾气对人类健康所构成的有害影响是普遍的，并且难以估算。

I have makd some rough calculations on the back of an envelope.
我在信封背面做了一些估算。

They sent someone to assess the value of the house.
他们派人去估算那座房子的价值。

They will size up the island.
他们要估算一下这个岛的面积。

The molecular weight of the peptide was estimated as about 1,200.
此肽的估算分子量为1200

estimated the square footage of new office space.
估算新办公室占地的平方尺寸

Could you approximate the cost?
你能大致估算一下成本吗

estimation是什么意思：
n. 看法，评价，判断；尊重，敬重；估计，估定

Estimable assets; an estimable distance.
可估计的财产；可估算的距离

It is only an estimate.
这只是一个估算值。

preliminary estimate and estimate of capital construction
基本建设概算、预算

preliminary estimate norms and estimate norms of capitalconstruction
基本建设概算、预算定额

What is the estimated flight time?
班机预定时间是几点？

estimate是什么意思：
v. 估计，估算，估量，估价；评价，评论，判断
n. 估计；估价；预测；看法，评价；判断；报价，预算书

Estimable assets; an estimable distance.
可估计的财产；可估算的距离

It is only an estimate.
这只是一个估算值。

preliminary estimate and estimate of capital construction
基本建设概算、预算

preliminary estimate norms and estimate norms of capitalconstruction
基本建设概算、预算定额

What is the estimated flight time?
班机预定时间是几点？