Both the R groups are alkoxy residues.两个R基团都是烷氧基.R " is a replaceable function , e . g . acetoxy, methoxy, their acyloxy and alkoxy homologs or halo.R ” 是取化基,如乙氧基 、 甲氧基及它们的环氧和烷氧同系物或卤基....
It enabled students to devote more time to their studies, or to be more accurate, more time to relaxation.它可以让学生们有更多的时间来学习，或者更准确一点说，有更多的时间来放松自己。FJC devote oneself to the needs of it is run high hope.FJC致力于满足这种不断高涨的期望.Tom...
Dextrose is a stabilizer, accounting for 5 - 30ú ? in weight ratio in granula.以葡萄糖为稳定剂, 其在粒剂中所占的重量百分比在5-30%之间.An understanding of accounting techniques is a major requisite for the work of the analysts.懂得会计知识是从事分析员工作的一个必...