英语词汇primary principal focal distance怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	primary principal focal distance
释义	primary principal focal distance 简明释义第一主焦距
随便看	friction loss friction loss friction loss coefficient friction losses friction loss factor friction loss of water head friction machine friction mandrel friction marks friction massage friction match friction match friction material friction mean effective pressure friction measurement friction mechanism friction melanosis friction member frictionmeter frictionmeter friction method friction model friction moment friction-monger friction motion

英汉双解词典包含3185865条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。