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- In this paper,the polyimides with ester group side chain and ether group side chain were synthesized from 4CAB/MDA/PMDA and 4AB/MDA/PMDA. 通过实验室自行合成的两种不同侧链的二胺单体,与4,4'-二胺基二苯甲烷和均苯四羧酸二酐聚合得到含有酯键型侧链和含有醚键型侧链结构的两种聚酰亚胺。
- In the liquid state. water molecules are highly associated because of hydrogen bonding.The hydroxyl and ether groups in glycols form similar associations with water molecules. 在液体状态.;水分子是高度伴生的由于氢接合
- Keywords poly（aryl amide）;pendant cyano group;ether group;polycondensation; 聚芳酰胺;氰侧基;醚基;缩聚反应;
- A whiff of ether will put you out in a few seconds. 一剂乙醚几秒钟后就会使你失去知觉。
- Education should not be restricted to any one specific age group. 教育不应限制在任何特定的年龄组上。
- He broke away from that lawless group years ago. 他在几年前脱离了那个非法团体。
- The group of barbaric soldiers killed many people. 那群野蛮的士兵杀了很多人。
- The group was made up of doctors. 这个团体是由医生组成的。
- A group of boys dashed out of the classroom. 一群男孩子从教室里冲出来。
- I come upon a group of children play in the street. 我遇到一群孩子在街上玩耍。
- He goes about with a group of nice boys. 他经常和一群好孩子在一起玩。
- He is a the most brisk young man in this group. 他是这个小组中最活跃的年轻人。
- He showed me a photo of a family group. 他给我看一张合家欢的照片。
- The chief accountant of a manufacturing group. 一个制造业集团的总会计师。
- The hunting group had good sport today. 今天打猎小组满载而归。
- I stand out in a group interview. 在集体面试中脱颖而出。
- Today's news goes into the ether and is soon forgotten. 今天的新闻广播听後不久即置於脑後了。
- He looked around the small group of mourners. 他环顾一下那一小群的送葬者。
- It was once believed that light waves traveled through the ether. 人们曾经相信光波在以太中穿过。
- The group of destroyers damaged the bus. 那群破坏者毁坏了这辆公共汽车。
