在预测行业里面，“已知的未知数”被称作不确定性。
In the forecasting business, "known unknowns" are called uncertainties.
有一小部分重要而快速的改变是难以预料到的 --已知的未知数。
There is a small set of fast moving important change that is hard to predict -- the known unknowns.
如今我们有了新的不确定性，关于当下的已知未知数在我的脑海里列了一张快速名单。
Today we have new uncertainties. I made a quick list of current known unknowns in my own mind.
用于物质的定性定量分析。可用于已知数、未知数的分子量、结构等测定，广泛适用于工业、农业、医药卫生、环境保护、科学研究等各个领域。
Qualitative and quantitative analysis; Identification of unknown and known samples; Widely used in industry, agriculture, medical work, environmental protection and scientific researches.
巧用图表法，碰到有些数学难题，可将已知数和未知数之间的关系列成图表，找出解题的方法。
V. Using the chart method, some mathematical problems encountered can be given numbers and the unknown relationship between the lash chart, find the problem-solving approach.
巧用图表法，碰到有些数学难题，可将已知数和未知数之间的关系列成图表，找出解题的方法。
V. Using the chart method, some mathematical problems encountered can be given numbers and the unknown relationship between the lash chart, find the problem-solving approach.
应用推荐