英语词汇550 mm a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	550 mm a
释义	mm noun— 毫米 n
随便看	xrf analyser xrf analyzer xrf screening xrf supplies x-Ring chain x-ringe x root directory xrs x scaling x school district x-seater x-section X-section dimension x-seen x-sell x series Xserve x sewed x-shaped frame x shaped region x shaped Scheme xsil xsl-fo x-slide xslt processor

英汉双解词典包含2273206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。

mm noun—