羰基化(合)物

carbonyl compound的用法和样例:

例句

  1. This dissertation studied allylation reactions of carbonyl compounds promoted by inorganic salts or carbon dioxide in aqueous media.本论文主要研究了水相中无机盐和二氧化碳促进羰基化合物烯丙基化反应。
  2. UV analysis showed that new compound was formed between the pigment and ferulic acid or salicylic acid, demonstrating formation of acylated pigment.紫外光谱分析显示,阿魏酸或水杨酸与紫甘蓝色素形成了新的化合物,从而证实了酰基化色素的形成。

Section A [00:01.23]1. W: Have you checked it for me? [00:04.26]M: Yes.There are temporary vacancies at the moment,but you may look back in a month. [00:09.40]Q: What does the woman want to be? [00:12.38]2. M: I'd like to book a flight to Munich for

发表于:2018-11-29 / 阅读(221) / 评论(0) 分类 决胜四级听力必备

Today's show goes out to Law Enforcement Officer Memorial High in Florida and North Kansas City High in Missouri. It's great seeing some of your students at the CNN Center recently! Today on CNN Student News, a match made in the wireless world: We're

发表于:2018-12-02 / 阅读(116) / 评论(0) 分类 CNN2011年(三)月

Grammar Girl here. Todays topic is the complex-compound sentence. Guest writer Sal Glynn writes: Most writers worth their fingertip calluses begin as avid readers. We read books, magazines, and websites indiscriminately until we start to notice the w

发表于:2018-12-07 / 阅读(163) / 评论(0) 分类 英语语法 Grammar Girl

[00:01.45]Exercise 6 Listen to the lecture again [00:05.04]and complete the fatfiles. [00:08.94]Pronunciation [00:09.55]Exercise 8 Listen to the lectrue again [00:13.06]and take note of the pronunciation [00:15.08]of the compound words. [00:17.82]Exe

发表于:2018-12-13 / 阅读(199) / 评论(0) 分类 北师大版高中英语模块8(选修)

1. The White House says sanctions may be coming against Syria with the US condemning violent crackdown on anti-government protesters there. More than 300 people have been killed. 2. Mississippi Governor Haley Barbour says he is not running for presid

发表于:2018-12-15 / 阅读(170) / 评论(0) 分类 美联社新闻一分钟2011(四月)

addition [ə'diʃən] n.加,增加(量) boss [bɔs] n.老板,工头 compound ['kəmpaund] n.复合物,化合物 difficult ['difikəlt] a.困难的 expert ['ekspə:t] n.专家,能手 headquarters ['hed'kwə:təz] n.司令部,指挥部,总部

发表于:2018-12-19 / 阅读(241) / 评论(0) 分类 TED演讲教育篇

Intonation can indicate completely different meanings for otherwise similar words or phrases. For example, an English teacher teaches English, but an English teacher is from England; French class is where you study French, but French class is Gallic

发表于:2018-12-27 / 阅读(116) / 评论(0) 分类 美式英语正音训练

坚持不懈,直到成功。 我们每天的奋斗就像对参天大树的一次砍击,头几刀可能了无痕迹。每一击看似微不足道,然而,累积起来,巨树终会倒下。这恰

发表于:2019-01-03 / 阅读(200) / 评论(0) 分类 四六级词汇与结构练习

1. Authorities in Utah say they found no signs of six trapped miners when they lowered a camera down to where they think the men are located. This is their second effort to make contact with the men. Yesterday a microphone was lowered down to a separ

发表于:2019-01-08 / 阅读(196) / 评论(0) 分类 美联社新闻一分钟2007

AGRICULTURE REPORT - Scientists Find Compound in Smoke that Helps Seeds Grow By Mario Ritter Broadcast: Tuesday, July 20, 2004 This is Steve Ember with the VOA Special English Agriculture Report. A di

发表于:2019-01-11 / 阅读(162) / 评论(0) 分类 农业与发展

The United Nation's World Food Program says rogue members of Somalia's extremist al-Shabab group attempted to raid its compound late Sunday in the Somali town of Wajid, about 300 kilometers northwest of Mogadishu. World Food Program spokesman, Peter

发表于:2019-01-14 / 阅读(200) / 评论(0) 分类 VOA标准英语2009年(八月)

Exercise 11-8: Your Own Compound Nouns CD 4 Track 45 Pause the CD and build up your own compound nouns, both subject and object. 图片1

发表于:2019-01-15 / 阅读(119) / 评论(0) 分类 标准美语发音的13个秘诀 CD4

To join Al Qaeda in Osama bin Ladens day, prospective recruits had to take an arduous and risky journey to the networks haven in the mountains of northwestern Pakistan, the heartland of global Islamist militancy. 想在奥萨马本拉登时代加入基

发表于:2019-01-16 / 阅读(116) / 评论(0) 分类 英语新闻

What do these five words have in common: hotdog, fireworks, well-being, waistline, sunset and ice cream? They could all describe a fun holiday celebration. For example: My holiday was wonderful! I went to a friends party and we laughed, ate and had a

发表于:2019-01-21 / 阅读(209) / 评论(0) 分类 2018年VOA慢速英语(十二)月

文本: Maiev:Elune be praised! I knew you would come, Shando Stormrage! Malfurion:Im glad we reached you in time, Maiev. Maiev:Priestess Tyrande, Im surprised you came in person. Are you here to _(1)_ your guilty conscience? Tyrande:I did

发表于:2019-01-23 / 阅读(148) / 评论(0) 分类 小龟乐游记英语短文

By Elizabeth Carlassare. Todays topic is compound interest. Albert Einstein is often quoted as having said something to the effect that compound interest is the greatest wonder of the universe. Its an urban legend, but it packs some punch! In todays

发表于:2019-01-30 / 阅读(187) / 评论(0) 分类 货币英语

U.S. President Barack Obama has announced that the world's most wanted terrorist(恐怖分子 ), al-Qaida leader Osama bin Laden, was killed by U.S. forces on Sunday at a compound deep inside Pakistan. Mr. Obama made the announcement during a liv

发表于:2019-02-04 / 阅读(138) / 评论(0) 分类 英语新闻

Dear Lexie,亲爱的莱克西: On your first day of college, let me congratulate you on your well-earned freedom. No more curfews[宵禁]. No more being dragged places you'd rather not be. No more of Dad's teachable[可教的] moments about respons

发表于:2019-02-09 / 阅读(149) / 评论(0) 分类 实用英语

ISLAMABAD, Feb. 25 (Xinhua) -- The living compound of the former al-Qaida chief Osama bin Laden in Pakistan's northwest city of Abbottabad is being demolished, said one local media report. Local Urdu TV channel Express said that the front part of bin

发表于:2019-02-18 / 阅读(135) / 评论(0) 分类 英语新闻

Rebel fighters have seized Moammar Gadhafi's compound in the capital, Tripoli, and are celebrating what they consider a major victory over the Libyan leader and his loyalist troops. The rebel fighters fought their way into Gadhafi's Bab al-Aziziya co

发表于:2019-02-18 / 阅读(113) / 评论(0) 分类 英语新闻
学英语单词
A little learning is a dangerous thing.
adaptive sampling
alinement
autophony
ballsacks
bijou bottle
bilateral zygomorphic
Bise-zaki
blunder into
bourns
buddhist statue
calcium ferricyanide
close-coupling approximation
closed booth
coefficient of plated welding
combined station
critical vibration
demerit sampling plan
differential height
disoperculate
ebrahims
effect an alteration
emery buffing
end-nuclei
eupraxy
exsect
failure to trip
felstone
five-point
floral abortion
flow pulse
fundamental concepts
G-Unit
glissade en arri?re
greedly
Green's difference formula
guarantee time
hacker-proof
Halbenrain
hard candy
heat transfer compound
holinger
homatropine
hospita
in some instances
inial
instrumentationsystem
interacting computation
intercellular secretory capillary
Japan Productivity Center
Ktiv Male
lapjacking
Lesnoye
let sth take its course
liaoyang
locution
loop yarn
mbugua
mesophilous bacteria
mike us
multiple epidermis
munidopsis sarissa
natural affection
nickola
oligonychus (pritchardinychus) uruma
orthobunyaviruses
oxide-base ceramic
P-E ratio
pen interface
periosteal implantation
polarized area
prescientific
program reference behaviour
propenoates
protocol method
quasi-aperiodic interference
raetellops pulchella
rhinencephala
ripple drift
rise in rebellion
Saint-Apollinaire
sample system miniaturization
scaningtelemete
Sharāf, Jab.
spiral canon
sullows
synagogue
telegraph selector
throwing in
Torixoreu
true horsepower
unlief
unspangled
varnsingite
vestigialside-band transmission
Wandervogel
weathering machine
wedding-goer
wind tunnel computer
wubangziside
Yudino
zeroadjustment