叽咯(一种五倍杂环混合物)

pyrrole的用法和样例:

词汇搭配

  • carbonyl pyrrole碳酰吡咯
  • dimethyl pyrrole二甲基吡咯

Egyptian archaeologists have discovered the bottom part of an unknown pyramid in the Sakkara area about 18 miles south of Cairo. NationalGeographic explorer-in-residence Dr. Zahi Hawass, the Secretary General of the Egyptian Supreme Council for Anti

发表于:2018-12-30 / 阅读(207) / 评论(0) 分类 国家地理2008年

Today, guest-writer Neal Whitman will help us understand why the word troops can refer to the number of individuals or groups. What Does Troops Mean? Memorial Day is next week, when we in the U.S. honor members of the military who have died in the li

发表于:2019-01-02 / 阅读(210) / 评论(0) 分类 英语语法 Grammar Girl

By Mario Ritter Broadcast: October 7, 2003 This is Doug Johnson with the VOA Special English Agriculture Report. Today we finish a two-part series. A listener in Brazil asked about 1)agroecology. This

发表于:2019-01-02 / 阅读(232) / 评论(0) 分类 VOA2003(下)-农业与经济

By Mario Ritter Broadcast: September 30, 2003 This is Steve Ember with the VOA Special English Agriculture Report. This week, we take a suggestion from a listener in Brazil. Agricultural specialist Lu

发表于:2019-01-04 / 阅读(223) / 评论(0) 分类 VOA2003(下)-农业与经济

By Michael Kohn Kabul 19 October 2006 Houses in Murad Khane that will be restored by the Turquoise Mountain Foundation The neighborhood of Murad Khane in Kabul's Old City was once a wealthy area of merchants and members of the royal family. But afte

发表于:2019-01-06 / 阅读(273) / 评论(0) 分类 2006年VOA标准英语(十月)

[全屏观看] 点击右键- 另存为 可保存这个Flash影片 介绍说明: W.A.S.D/移动。

发表于:2019-01-08 / 阅读(174) / 评论(0) 分类 英语单机游戏

By Cathy Majtenyi Nairobi 22 December 2006 In Somalia, Islamist fighters and government troops continue to battle each other near the government stronghold of Baidoa, with each side claiming to have killed hundreds of troops of the other side's. Cat

发表于:2019-01-12 / 阅读(206) / 评论(0) 分类 2006年VOA标准英语(十二月)

By Phil Mercer Sydney 19 April 2006 Residents watch the smoke rise in Honiara, the Solomon Islands capital, Wednesday, April 19, 2006 after a night of rioting in the aftermath of the election of Snyde

发表于:2019-01-13 / 阅读(227) / 评论(0) 分类 2006年VOA标准英语(四月)

By Jeffrey Young Washington 12 June 2007 To most Americans, the governments in their towns and regional areas, called counties, are the governments they interact with the most. And alongside these local governments are groups of citizens who work on

发表于:2019-01-16 / 阅读(209) / 评论(0) 分类 2007年VOA标准英语(六月)

Egyptian archaeologists have discovered the bottom part of an unknown pyramid in the Sakkara area about 18 miles south of Cairo. National Geographic explorer-in-residence Dr. Zahi Hawass, the Secretary General of the Egyptian Supreme Council for Anti

发表于:2019-01-22 / 阅读(219) / 评论(0) 分类 自然百科2008年

By Stephanie Ho Washington 15 November 2006 The non-profit group , One Laptop per Child has unveiled a low-cost, high-durability laptop computer that it says it wants to put into the hands of children across the globe. Children's laptop from One Lap

发表于:2019-01-31 / 阅读(241) / 评论(0) 分类 2006年VOA标准英语(十一月)

By Ernest Leong Washington, D.C. 10 November 2006 watch Gates profile Robert Gates, President Bush's nominee to become the new U.S. Defense Secretary, is a former CIA Director with decades of experience in the national security field. He has also se

发表于:2019-01-31 / 阅读(273) / 评论(0) 分类 2006年VOA标准英语(十一月)

By Cathy Majtenyi Nairobi 01 February 2007 Burundi has agreed to offer troops for the African Union peacekeeping initiative in Somalia. Meanwhile, Uganda's parliament is brushing aside attempts by the ruling party to push through a motion to send Uga

发表于:2019-02-01 / 阅读(203) / 评论(0) 分类 2007年VOA标准英语(二月)

Earlier this year, President Bush said the United States would spend $350 million over five years to fight seven of the world's most common parasitic and bacterial diseases affecting hundreds of millions of people in tropical regions of the world. A

发表于:2019-02-02 / 阅读(209) / 评论(0) 分类 VOA标准英语2008年(七月)

今天我们要学的词是robocall。 Robocall指的是由计算机系统自动拨号,播放事先录制的电话留言的宣传电话。Robocall是产品促销和政治竞选的常用手段。A GOP group launched its robocall campaign against Sen

发表于:2019-02-04 / 阅读(253) / 评论(0) 分类 英语每日一词

Probiotic yoghurt drinks and supplements dont live up to their promises, according to an EU watchdog. They claim to boost your immune system and help digestion. It concluded there is no scientific proof that products such as Yakult have any health be

发表于:2019-02-04 / 阅读(164) / 评论(0) 分类 阅读空间

OMG! Congratulations to both of you!! How did he pop the question??OMG! 祝贺你们俩啊!!他怎么求的婚啊??

发表于:2019-02-06 / 阅读(190) / 评论(0) 分类 OMG美语

By Zulima Palacio, Cindy Saine Washington, D.C. 05 July 2006 Watch Protest Report Protestor A small group of about 15 people gathered in front of the Washington bureau of the New York Times Monday to protest the paper's publishing of what some call

发表于:2019-02-07 / 阅读(319) / 评论(0) 分类 2006年VOA标准英语(七月)

BEIJING, Nov. 22 (Xinhuanet) -- Global AIDS deaths and new HIV infections have each dropped 21 percent since the peak of the AIDS pandemic in 1997, according to a UN report released Monday. One major factor responsible for the result is that life-sav

发表于:2019-02-17 / 阅读(151) / 评论(0) 分类 英语新闻
学英语单词
active surface of an electrode
affluence
authorized data list
bevelling frame
blue rockfish
bone up on
brevicolline
bridgman heat
bypass cancel character
capital divided into shares
cercospora gerberae
completely unstable
contemporaneous dolomite
cyanoethlation
cylinder friction coupling
Desameton
diameter of wire cord
different areas
Dolly Varden pattern
Donbas
Dreyfusard
drying in the shade
Duration matching
El Jute
elastin fibers
electroplating system
equi-inclination photograph
Erbes-Büdesheim
Ernest Bevin
expense center
explode with
figurals
final grade line
finished ingot
foreseeable damages
gasoline stabilizer
gildsman
gland nut
green men
growl about
histocultures
idoloclast
in knots
inveigle
IP (index of performance)
keep someone's finger on the pulse
knowing hat
lienteric stool
local circuit neuron
loosened
LWT
Lynemouth
malariosis
marine photogrammetric survey
marsupial moles
MBFR
melaminoplast
metal-pool spraying
miscuts
mitrebox
model decomposition
muammar al-qaddafis
muscazone
mustelidaes
nonisotopic carrier
Novosul
p-(p-toluoyl)benzoic acid
Parisienne
peak of flight
platichthyss
potato Y-mosaic virus
pronuclear
pulse-delay line
quarrel with one's bread and butter
raised flower pattern
record communication system
registering hole
rensch
rising anvil
romalpa
rutans
Sason Deresi
scissors jumping
selective right cardiography
series coil trip
show one's years
speed down press-button
stress psychology
striatal
superpersons
surveillance tube
swing jack
terminal structure
the count of monte cristo
to pieces
tsang-jye input method
two bonded elastic layer
unit operating cycle
vertical differentiation
vibration level
water-rights
wennberg