请教一点英语翻译

雷v阿非

请教几句话,关于MOS失配的PAPER上的句子

For collecting statistics,128device pairs of each size were measured on every values over four wafers.Although the error bars appear large in this figure, in reality they represent relatively small deviations .For example,devices with W/L=6UM/3 have a spread in the standard deviation of matching of threshold voltage of 3.4 -4.9 mv .This spread is partly due to the nominal process variations from wafer to wafer, and partly due to the dependence of the matching on the electrical dimensions of the device.

linuxwinner

spread ==> 擴散
nominal ==> 正常
electrical dimension ==> 電氣角度/範疇

雷v阿非

我的理解：
分布
标准
电气范围