以: use; take为: support; stand for底: bottom; base的: 4次方是 The fourth power of 2 i ...对数: logarithm对数(以10为底): log logarithm(to the base 10)以十为底的对数: denary logarithm以十为底的: decimal base即10为底数: math.log10e函数的对数: gammaln幂级数的对数: power series logarithm粘度的对数值: log viscosity对数的对数形纵剖面: log log profile均值平均数的对数: log-mean average抗体形成的对数期: logarithmic phase of antibody formation能量的对数变化: logarithmic energy change人口的对数增长: logarithmic increase in population以10英尺的间隔排列: arranged at intervals of ten feet氢离子浓度倒数的对数: logartihm of hydrogen ion concertration reciprocal; ph同系物的对数标绘法: log plotting of homologous series以: Ⅰ动词(用; 拿) use; take 以我之长, 攻敌之短 utilize our strong points to attack the enemy's weak points; 以共同对敌的大局为重 set the general interest of fighting against the common enemy above everything elseⅡ介词1.(用; 拿) with; by 以理服人 convince people by reasoning; 赠以鲜花 present sb. with a bouquet2.(依; 按照) according to 以成绩录取新生 enroll students according to their merits; 以时启闭 open and close according to schedule; 以姓氏笔画为序 be listed in the order of the number of strokes in their surnames3.(因) because of 不以人废言 not reject a saying because the speaker is what or who he is; 不以失败自馁, 不以成功自满 not lose heart because of failure nor feel conceited because of success;以风景优美著称 be celebrated for its scenic beauty; 何以知之? how do you know? 苏州以其美丽的园林而闻名。suzhou is celebrated for her beautiful gardens. 他以有学问而出名。he is famous for his learning.4.(表示目的) in order to; so as to 以示区别 so as to distinguish this from other cases; 以应急需 in order to answer an urgent need5.[书面语] (于; 在) at (a certain time); on (a fixed date) 余以三月一日返。i returned on march the first.6.(放在单纯的方位词前, 表示时间、方位、数量的界限) 二十年以前 twenty years ago or earlier; 黄河以北 ( to the ) north of the huanghe river; 五千以内 less than five thousand; 县团以上 of county or regiment level and higherⅢ连词[书面语] (跟 “而 ”用法相同) and; as well as 淅沥以潇飒 raindrops pattering and wind rusting; 城高以厚。the city wall is high and thick.Ⅳ名词(姓氏) a surname 以相 yi xiang底的: basal根据中子通量密度的对数功率测量装置: logarithmic power measuring assembly based on the neutron flux density对数: [数学] logarithm◇对数表 log [logarithmic] tables; logarithmic scales; 对数乘法器 logarithmic multiplier即2为底数: maht.log2e