be specialized in 的用法

be specialized in 的用法 be specialized in和specialized in的区别是什么.specialize如何运用我想写这样的意思，i am david from XXXX,a company (专注于).....想用specialize一字,想知道be specialized in和specialize in的区别是什么。到底需要加 求详细分析解答以下句子结构错误的原因错误句子：Be specialized in the export of electronic product,we express our desire to establish the relationship with you.正确句子：Being specialized in the export of electronicproduct,w specialized specialized 是什么牌子的自行车 六级某听力题的两个选项,意思有什么不同：he specializes in international relationship.he specialized in international relationship. SAT 的一道writing的题Bertha Lamme received her engineering degree in 1893,which she then specialized professionally in the design of motors and generators.(A) 1893,which she then specialized professionally (B) 1893,specializing as her profession specialized cell 的最准确的中文翻译? We live in a world where knowledge is accumulated by multiplying and at the same time becomes more and more specialized这里的specialized是动名词还是过去分词?为什么 specialized山地车specialized的山地车,是不是有一款1700多的? investment bank specialized in underwriting corporate and government securities 系动词填空Whenever living things e___ in groups,their society tend to be more complex and specialiWhenever living things e___ in groups，their society tend to be more complex and specialized. 英语翻译The METER has been designed to be used as a component of a centrallzed system for the distribution of oils and other industrial fluids,which must be manufactured and installed by specialized personnel in compliance with the standards rele 西安那里有卖美国specialized 闪电自行车的? 英语翻译sender money backfeatured before your eyesdemand for multi-functionscommunicate with sizequality be put into the marketdesign clockbagan a new research project specialized in madufacturingTCL Cell PhoneTCL Mobile Communication Co.,Ltd.is specialized是什么意思 specialized是什么意思 这个句子中为什么要用doesI'dlike to discuss another specialized use that's not common in egrep (althoughGNU's popular version does support it), but which is commonly found in manyother tools.括号里的那句GNU's popular version does suppo