单词：heterocyclic ring
[医] 杂环
heterocyclic ring的用法和样例：
例句
- A class of organic compounds having a five-membered heterocyclic ring with two double bonds.氮杂茂一种由五种杂环元素，两组粘合剂组成的有机化合物。
- The resonance energy of aromatic heterocyclic compomds is an importrtemt parameter in studying their properties.共振能是研究芳杂环化合物性质的重要参数。
单词：heterocyclic ring 相关文章
Hello and welcome to the VOA Learning English program Words and Their Stories. Everyone around the world celebrates the New Year differently and at different times. Most people in the U.S. celebrate it on January 1. But they may also observe New Year
2017年VOA慢速英语(十二)月
Ian Mackellen (Gandalf): I’m sure the audience watching will be full of fear and anticipation. It’s the 1) ultimate adventure story. The Lord of the Rings takes place in a world called Middle Eart
疯狂英语2002年
The fate of the world will soon be decided. The 1) dominion of evil grows even stronger. There is a union now, between the two towers: Barad-dur, 2) fortress of the dark lord Sauron. And Orthanc, 3) s
疯狂英语2002年
今天我们要学的词组是ring。 Ring是戒指，耳环，也指从事非法活动的集团、团伙。比如贩毒集团 -- drug ring，出售儿童色情录像的团伙 -- child pornography ring。 有报道说， 奥地利政府侦破了一个在
英语每日一词
说一口流利的英语，从简单的单词开始。 听听，读读，背背，今天你的词汇量又增加了5个。 单词/词义 中英例句 单词听读 single [ 5siN^l ] She buys a single ne
每日攻克5词
Ring A Ring Of Roses a ring of roses a pocket full of posies (hot-sha hat-sha all fall down)* ring a ring of roses a pocket full of posies (hot-sha hat-sha all fall down)* the king has sent his daughter to fetch a pail of water (hot-sha hat-sha all f
优美儿童英语歌曲
to throw one's hat in the ring to go on the stump 在竞选的第一个阶段，那些认为自己有资格当总统的人经过多方考虑后作出决定究竟参不参加这次总统竞选。美国人
美国习惯用语
Throw your hat in the ring的意思是“宣布参加一场比赛”，尤指参加政府竞选。但这种说法从何而来？它和ring（拳击赛场）又有何联系？请听以下细细分解。
英文语法词汇
英文歌词: Orange Blossom Ring---The Klezmatics I loved a man so kind and sweet And every night we used to meet He gave to me my orange blossom ring. He got in trouble down in town The deputy sheriff shot him down I wore his golden orange blossom rin
音乐咖啡厅
RING A RING O ROSES Ring a-ring o' roses, A pocketful of posies. A-tishoo! A-tishoo! We all fall down! The cows are in the meadow Lying fast asleep, A-tischoo! A-tischoo! We all get up again.
鹅妈妈童谣
AS IT IS 2016-09-02 Ring of Fire Eclipse Passes Over Africa People in parts of Africa witnessed a ring of fire in the sky Thursday, created by the moon passing between the Earth and the sun. The solar event is called an annular eclipse. A total solar
2016年VOA慢速英语(九)月
Sorry,there is not text temporarily, Please help tingroom to look for it! 如果您能找到更好的听力原文，请发贴到 听力原文收集区 ，您将会获得10到30积分的奖励! Thank you！
英语单词荟萃
歌词如下： Ring,ring,ring the bells, Ring them loud and clear. To tell the children everywhere, That Christmastime is here. Ring,ring,ring the bells, Ring them loud and clear. To tell the children everywhere, That Christmastime is here.
英语儿歌274首
Sorry,there is not text temporarily, Please help tingroom to look for it! 如果您能找到更好的听力原文，请发贴到 听力原文收集区 ，您将会获得10到30积分的奖励! Thank you！
英语单词荟萃
Brass ring: 发财机会！ 嘿，如果有送上门来的发财机会，您可千万要抓住哦！ 看了这句话，您一定要笑，除非是傻瓜笨蛋，否则没人不知道这个理儿，当然，前提条件是法律允许范围之内。道理
英语口语
If you were going to a restaurant and wanted a healthier option, 如果你去饭店，你想吃得健康一点， which would you choose, grilled or fried chicken? 你会选择哪种食品呢，烤鸡还是炸鸡？ Now most people would answer grill
TED演讲教育篇
今天学的词组是throw one's hat in the ring。这个词组的字面意思是把帽子扔进拳击场。据说在19世纪的拳击比赛中，有人要和拳击手较量，就把帽子扔进拳击场里 -- throw his hat in the ring。后来把帽子
学个词