音标:[,mju:tә'feiʃәnt] ;
a. [生]诱变的,突变加强的
a capable of inducing mutation (used mainly of intracellular agents)

RACHEL MARTIN, HOST: Hugh Hefner has died at the age of 91. He created Playboy magazine at his kitchen table in Chicago in the early 1950s. It became not only a brand but it came to symbolize a lifestyle, both glorified and despised, of lavish partie

发表于:2018-12-02 / 阅读(96) / 评论(0) 分类 2017年NPR美国国家公共电台9月

THE MAKING OF A NATION - American History: The War in the Pacific 建国史话- 太平洋战争 STEVE EMBER: Welcome to THE MAKING OF A NATION -- American history in VOA Special English. I'm Steve Ember. (MUSIC) American military planners had to make

发表于:2018-12-16 / 阅读(55) / 评论(0) 分类 2011年VOA慢速英语(六)月

Agriculture Report - Experts Link East Africa Drought to La Ni?a in the Pacific 农业报道 - 专家认为东非干旱与拉尼娜现象有关 This is the VOA Special English Agriculture Report. 这里是美国之音慢速英语农业报道。 East

发表于:2018-12-16 / 阅读(69) / 评论(0) 分类 2011年VOA慢速英语(八)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!

发表于:2018-12-30 / 阅读(116) / 评论(0) 分类 单词解析速记

by Jason Marshall Weve spent the last few articles building our numerical vocabulary from the ground up. Today, were going to talk about something that sounds hard, but is actually pretty easy...and very useful too: the commutative property of additi

发表于:2019-01-02 / 阅读(175) / 评论(0) 分类 数学英语

A: Hello, Nicole here. B: Nicole, this is Richard. I think you know why I'm calling. A: Oh, it's about the rent. B: Yes, this is the second month in a row. A: I thought there was a grace period. B: There is no grace period in the rental agreement. A:

发表于:2019-01-06 / 阅读(90) / 评论(0) 分类 地道英语对话-租房

A: Hi, this is Nicole. B: Hi, Nicole. Richard here. I think you've got a good idea why I'm calling. A: Yes. It's about the rent, isn't it? B: Yes, your rent is late. This is the second month in a row. A: But I thought that I had a grace period. B: I

发表于:2019-01-06 / 阅读(91) / 评论(0) 分类 地道英语对话-租房

A: Hello, Nicole here. Who's calling, please? B: Hey, Nicole. It's Richard. I'm pretty sure you know why I'm calling. A: Yes, a dollar gets a dime that you're calling about the rent. B: Nicole, for the second month in a row, your rent is late. A: I t

发表于:2019-01-06 / 阅读(110) / 评论(0) 分类 地道英语对话-租房

A: Hello. This is Nicole. B: This is Richard. Let's not play games. You know why I'm calling. A: Oh, not again! You're calling about the rent. B: Yes, your rent check is late, just like last month. A: What happened to my grace period? B: Why would th

发表于:2019-01-06 / 阅读(95) / 评论(0) 分类 地道英语对话-租房

Several oil and gas facilities in the Gulf of Mexico have resumed operations following Hurricane Katrina. However, an industry analyst says the full extent of damage to generating facilities is still unknown. 美国墨西哥湾地区的几个炼油厂在

发表于:2019-01-19 / 阅读(99) / 评论(0) 分类 VOA双语新闻 Bilingual News

THE MAKING OF A NATION - May 23, 2002: The War in the Pacific By David Jarmul VOICE 1: THE MAKING OF A NATION, a program in Special English by the Voice of America. (Theme) American military planners

发表于:2019-01-19 / 阅读(115) / 评论(0) 分类 The Making of a Nation

A young man goes into a drug store to buy condoms. The pharmacist says the condoms come in packs of 3, 9 or 12 and asks the young man wants. Well, he said, I've been seeing this girl for a while and she's really hot. I want condoms because I think to

发表于:2019-01-19 / 阅读(100) / 评论(0) 分类 趣味英语

A: Hi, this is Nicole. B: Nicole, it's Richard. You know why I'm calling. A: Yes, I know. It's the rent, isn't it? B: Yes, just like last month, your rent is overdue. A: What about my grace period? B: Are you getting Alzheimer's? There is no grace pe

发表于:2019-01-20 / 阅读(92) / 评论(0) 分类 地道英语对话-租房

By Margaret Besheer Irbil, Iraq 13 April 2007 An insurgent umbrella group which includes al-Qaida in Iraq, claimed Friday it carried out the parliament suicide bombing in Baghdad's Green Zone. The U.S. military has revised the death toll of the bombi

发表于:2019-01-31 / 阅读(143) / 评论(0) 分类 2007年VOA标准英语(四月)

32 . Journey To The Bottoms Of The Pacific Ocean The journey two naval officers made some time ago to the very deepest point on the earth makes us realize how much of the world still remains to be explored. The two men went down seven miles to the

发表于:2019-02-03 / 阅读(135) / 评论(0) 分类 英语背诵文选第一册

Its hard to find something not impacted by our current financial crisis. Here are 12 examples of what the recession means for specific things, from Spam to sex addiction. 1. Spam It looks like meat, it tastes like meat, but its a far cheaper substitu

发表于:2019-02-04 / 阅读(297) / 评论(0) 分类 阅读空间

艺术史绝非一成不变。工程师Engineer Maurizio Seracini耗费30年的精力探寻达芬奇失传壁画安吉亚里战役。在探索过程中,尘封在历史中的大量作品昭然于世。这些画中秘密的探寻是否也可以成为一

发表于:2019-02-05 / 阅读(90) / 评论(0) 分类 TED公开课:艺术与幻觉

今天我们要学的词是racial。 Racial, 是种族的意思。 Racial discrimination, 种族歧视。 Racial tension, 种族关系紧张。华盛顿邮报的一份最新民调显示, Three in ten Americans admit feelings of racial bias, 美国十

发表于:2019-02-08 / 阅读(65) / 评论(0) 分类 英语单词荟萃

Pacific actors gather in Fiji for humanitarian responses against natural disasters SUVA, Oct. 23 (Xinhua) -- Over 100 actors from the Pacific Islands region have gathered for the 5th Annual Pacific Humanitarian Team Regional Workshop in Fiji's wester

发表于:2019-02-17 / 阅读(156) / 评论(0) 分类 英语新闻

WASHINGTON, March 12 (Xinhua) -- The United States and China on Monday held the third round of Consultations on Asia-Pacific at the U.S. Naval Academy in Annapolis, Maryland. The closed-door consultations were co-chaired by U.S. Assistant Secretary o

发表于:2019-02-19 / 阅读(83) / 评论(0) 分类 英语新闻