音标：['ɔpә,rɔn] ；

n. [生]操纵子

n a segment of DNA containing adjacent genes including structural genes and an operator gene and a regulatory gene

词型变化：名词复数形式 : operons

operon的用法和样例：

例句

用作名词(n.)

In negative repressible operons, transcription of the genes on the operon normally takes place.操纵子亦可以是正向调控的。

Massive Military Operation Launched by Israel

Ross Dunn Witnesses say hundreds of Israeli soldiers have been deployed in southern Gaza. The forces, which include armored, engineering and infantry units, backed by tanks, bulldozers and helicopter

发表于:2018-12-08 / 阅读(127) / 评论(0)

VOA2004（上）--巴以冲突

访谈录 2012-06-23&06-25 奥普拉专访金.卡戴珊

now, operah one-on-one on a revealing interview with reality star kim kardashian , about really what's wrong with her broken marriage to a basketball player,and what about the superstar singer she is currently dating,maybe John has a first~,good morn

发表于:2018-12-11 / 阅读(133) / 评论(0)

访谈录2012年

VOA常速英语2008年-Israeli Military Operation in Gaza Kills Nearly

By Robert Berger Jerusalem 01 March 2008 At least 46 Palestinians have been killed in escalating Israeli raids in the Gaza Strip. Palestinian hospital officials say a number of the Palestinians killed were civilians. The others are believed to be Pal

发表于:2019-01-12 / 阅读(123) / 评论(0)

VOA标准英语2008年（三月）

VOA标准英语2008年-Colombia Backs Second Venezuelan Hostage Operat

By Brian Wagner Miami 10 January 2008 Colombia's government has approved a new attempt by Venezuela to pick up two hostages held by leftist rebels in the Colombian jungle. VOA's Brian Wagner reports Venezuela's president says he has received instruct

发表于:2019-01-13 / 阅读(146) / 评论(0)

VOA标准英语2008年（一月）

VOA标准英语10月-NATO Launches Anti-Piracy Operation for Horn of A

NATO warships have launched an anti-piracy operation off the coast of Somalia by escorting one ship to port with plans for a similar operation on Tuesday. Lisa Bryant has more from Paris. The NATO operation aims to help calm the situation off Somali

发表于:2019-01-13 / 阅读(149) / 评论(0)

VOA标准英语2008年（十月）

VOA标准英语2009年-Philippines Launches Massive Relief Operat

By Heda Bayron Hong Kong 28 September 2009 The Philippines has appealed for international assistance following the worst flooding in more than 40 years. At least 140 people have been killed as a result of the heavy rains and, as the death toll from

发表于:2019-01-13 / 阅读(141) / 评论(0)

VOA标准英语2009年(九月)

2006年VOA标准英语-UAE-based Company Gives Up Management Oper

By Deborah Tate Capitol Hill 09 March 2006 A company based in the United Arab Emirates, Dubai Ports World, says it is transferring management operations at six U.S. ports to a U.S. entity. The surpris

发表于:2019-02-05 / 阅读(222) / 评论(0)

2006年VOA标准英语（三月）

高频英语口语对话第379期:打越洋电话至北京

unit 410 打越洋电话至北京 dialogue 英语情景对话 A:Opercrtor, I want to make a collect overseas phone call to Beijing. A:接线生，我要打一通对方付款的越洋电话到北京。 B:Whom would you like to talk to? B:您要找哪？

发表于:2019-02-15 / 阅读(248) / 评论(0)

高频英语口语对话

英语PK台第883期:词根词缀背单词(44)

一个英语单词可分为三部分：前缀（prefix）词根（root）后缀（suffix）。位于词根前面的部分就是前缀。前缀，可以改变单词的意思。 ation (用于名词)动作（造成的状态或结果） accommodation n.招

发表于:2019-02-21 / 阅读(123) / 评论(0)

英语PK台

最新学习文章

热门学习文章

热门标签

英语听力 VOA标准英语 VOA 英语歌曲口语听力提高听力材料听力教程英语学习 NPR 英语口语 VOA慢速英语美国国家电台儿童英语 VOA英语小学英语 cnn VOA常速英语标准英语英文歌曲听电影学英语英语单词英文电影慢速英语 CRI 美联社新闻美国有线新闻加州分级澳洲新闻流行歌曲常速英语 ABC新闻快递疯狂英语英语读物听力棚车少年经济学人英语词汇商务英语 VOA双语新闻 BBC 中国电台大学英语 Treasures 加州语文 BBC英语英语听力网站 VOA英语教学词汇万花筒 SSS VOA英语听力 AP 新概念分级英语英语广播听力精选英语播客英文绘本 TED演讲赖世雄英语MP3 CCTV9英语新闻 lesson 英语新闻初中英语学英语英语语法历史上的今天英文广播剧英语游戏原版英语小说英语有声读物书虫英语牛津英语读物访谈录新闻一分钟考研英语英语每日在线听新闻 Us 新概念英语地道英语单词第二册自然百科高中英语 sports 实用英语 MP3听力辛沛沛 ESL英语第一册英语每日一句 unit 新东方 GRE 每日一词 BBC听力

学英语单词

autotrophic metabolism