This paper describes the methods to mark the linear calibration and the uncertainty estimate when Fe in metallic silicon is determined by Atomic Absorption Spectrephotometry (AAS).

介绍了采用原子吸收光谱仪(AAS)对金属硅中铁杂质含量进行测定时，线性校正和不确定度评估的方法。

youdao

There is a wide range of uncertainty around the estimate of global drowning deaths.

对于全球溺水死亡数的估计有很多不确定性。

youdao

Sampling variability explains only a portion of the overall uncertainty in a modelled estimate.

抽样变异性仅仅解释了模型估测中整个不确定性的一部分。

youdao

Such is the uncertainty that environmentalists estimate that it could be anywhere from 500 to 1, 000 years.

CNN: All about plastic

Penney and new CEO Ron Johnson, cut her fourth-quarter profit estimate by nearly 90%, a surprise that reflects the uncertainty around the company.

FORBES: A J.C. Penney Bull Cuts Q4 Profit Estimate By Nearly 90%; Blames Holiday And Higher Costs