| 释义 |
DEFINITIVE EXAMPLES 权威例句〔density〕The quantity of something per unit measure, especially per unit length, area, or volume.密度：某物每单位测度的数量，尤指每单位长度、面积或体积美国传统〔resistivity〕Electricity The resistance per unit length of a substance with uniform cross section.【电学】 电阻系数：有均质截面的某一物质单位长度上的电阻美国传统〔wave number〕The number of waves per unit distance in a series of waves of a given wavelength; the reciprocal of the wavelength.频率：给定波长的一系列波中每单位长度波的数目；波长的倒数美国传统 |