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A variety of aldehydes were converted into acylals in good yields with anhydride in the presence of a catalytic amount of zinc bromide under solvent-free conditions.
中文意思:
以醛和酸酐为原料,溴化锌为催化剂,无溶剂条件下高产率地合成了偕二酸酯(其中醛与苯甲酸酐的反应是首次报道)。


以下为相关句子列表(点击查看,可以看对应的解释):
A variable so related to another that for each value assumed by one there is a value determined for the other. 应变量,函数一个与他量有关联的变量,这一量中的任何一值都能在他量中找到对应的固定值
A variable's value can change during the script. 一个变量值可以在脚本中进行改变。
A variant on the virus is the worm. 病毒的一个变种是蠕虫病毒。
A variation on question 5 above: write an essay discussing the development of the made-for-television film, using The Name of the Game as a precursor example and drawing on our archive of TV movies. 第5题的一个变形:写一篇论文来考察为电视制作的电影的发展,将《游戏名称》作为先驱性案例,并以我们关于电视电影的档案文件作为参考。
A varicose enlargement or swelling. 静脉曲张的肥大或肿胀。
A variety of aldehydes were converted into acylals in good yields with anhydride in the presence of a catalytic amount of zinc bromide under solvent-free conditions. 以醛和酸酐为原料,溴化锌为催化剂,无溶剂条件下高产率地合成了偕二酸酯(其中醛与苯甲酸酐的反应是首次报道)。
A variety of artificial fertilizers have been developed. 人们发明了各种人造化肥。
A variety of chemical carcinogens as diverse as benzene, cigarette smoke, and nitrites can initiate and/or promote this process. 多种多样的化学致癌物如苯、吸烟、亚硝酸盐都能够引起(和)或促进肿瘤的发生。
A variety of coatings may be provided on request to resist corrosion or abrasion. 可以根据耐腐蚀或耐研磨要求提供各种涂层。
A variety of investment companies, such as fixed assets, value securities, liquid assets, intangible assets, human capital, information technology, risks etc. 一个公司的投资种类繁多,如对固定资产、有价证券、流动资产、无形资产、人力资本、信息技术、风险等的投资。
A variety of item costs have been modified. 多种物品价格调整。
 
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