[有机化学] 活泼氢化合物

Today's topic is active voice versus passive voice. Here's Brian from Iowa: It drives me crazy when people write in passive voice. How can I teach people how to tell the difference between passive and active voice and stay away from passive voice? Th

发表于:2018-12-07 / 阅读(148) / 评论(0) 分类 英语语法 Grammar Girl

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(177) / 评论(0) 分类 英语语法 Grammar Girl

Broadcast: February 14, 2003 By George Grow This is the VOA Special English Environment Report. President Bush has offered a plan to speed development of technology that uses hydrogen as fuel. His goa

发表于:2018-12-07 / 阅读(174) / 评论(0) 分类 VOA2003(上)-科技导航

I am speaking not as a Briton, not as a European, not as a member of a western democracy, but as a human being, a member of the species Man, whose continued existence is in doubt. The world is full of conflicts: Jews and Arabs; Indians and Pakistanis

发表于:2018-12-12 / 阅读(144) / 评论(0) 分类 英语演讲

by Mignon Fogarty Today's topic is active voice versus passive voice. The podcast edition of this article was sponsored by GoToMeeting. With this meeting service, you can hold your meetings over the Internet and give presentations, product demos and

发表于:2018-12-15 / 阅读(148) / 评论(0) 分类 英语语法 Grammar Girl

Muslim Brotherhood Ready for More Active Role in Jordan From VOA Learning English, this is IN THE NEWS in Special English. The Muslim Brotherhood is one of the largest Islamic groups in the Arab world. For years, the Brotherhood has been banned in a

发表于:2018-12-16 / 阅读(122) / 评论(0) 分类 2013年VOA慢速英语(六)月

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(129) / 评论(0) 分类 美式英语正音训练

alkali碱 alloy结合体 aluminum铝 ajar半开的 bleach漂白 catalyst催化剂 compound化合物 crystal水晶 combustible易燃的 distill提炼 electrician电工 erase抹掉 flask烧瓶 fuse融合 hydrogen氢气 insulate隔热 intrinsic内在的

发表于:2018-12-30 / 阅读(153) / 评论(0) 分类 80天攻克雅思核心词汇

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(174) / 评论(0) 分类 农业与发展

Iranian President Mahmoud Ahmadinejad's visit to Istanbul last week is seen as part of Ankara's increasingly active role in the Middle East, after decades of passivity in the region. At the same time, some analysts say, Turkey's ties to the West are

发表于:2019-01-13 / 阅读(172) / 评论(0) 分类 VOA标准英语2008年(八月)

World Health Day Focuses On 'Active Aging' Shelby Harris just celebrated his 111th birthday. His secret? I try to live the right kind of life, he said. I try to live the truth, I love everybody and I want everybody to love me. Some experts say a posi

发表于:2019-01-13 / 阅读(142) / 评论(0) 分类 VOA标准英语2012年(四月)

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(210) / 评论(0) 分类 VOA标准英语2009年(八月)

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(220) / 评论(0) 分类 2018年VOA慢速英语(十二)月

LONDON, July 4 (Xinhua) -- Anders Fogh Rasmussen, Secretary General of the North Atlantic Treaty Organization (NATO) expressed his hope on Wednesday that NATO would seek a more active dialogue with China. We must expand the range of nations with whom

发表于:2019-01-30 / 阅读(200) / 评论(0) 分类 英语新闻

SEOUL, Nov. 8 (Xinhua) -- Samsung Electronics, the world's largest flat screen TV vendor, said Tuesday that it has suspended its plan to develop active shutter three-dimensional (3D) TVs with RealD, the U.S.-based 3D technology supplier. Samsung has

发表于:2019-01-30 / 阅读(173) / 评论(0) 分类 英语新闻

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(200) / 评论(0) 分类 货币英语

今天我们要学的词是active duty。 Active duty, 现役的。星期一是美国阵亡将士纪念日。 My friend Jack is an active duty Army Captain who has deployed overseas three times, 我朋友杰克是现役陆军上尉,先后三次被派

发表于:2019-02-05 / 阅读(165) / 评论(0) 分类 英语每日一词

PREFIX 1.a-:of;on;intensive;negative,not,without;ad-;ab-. 2.ab-:away from,off. 3. ad-:to;at;for. 4. aer(o)- :relating to air . 5.al-:all. 6.ambi-:on both sides,around. 7.amphi-:on both sides,around. 8.an-:negative,not,without. 9.ana-:upon,up,on. 10.a

发表于:2019-02-06 / 阅读(183) / 评论(0) 分类 雅思英语

December 30, 1954 I am speaking not as a Briton, not as a European, not as a member of a western democracy, but as a human being, a member of the species Man, whose continued existence is in doubt. The world is full of conflicts: Jews and Arabs; Indi

发表于:2019-02-09 / 阅读(184) / 评论(0) 分类 英语美文

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(143) / 评论(0) 分类 英语新闻
学英语单词
abdominal breathig
aiceona osugii
ain'
Amblainville
amebic pericarditis
anovulatory cycle
apron conveyor
Arnières
aromatics
artificial light
Baringo, L.
barun
battle-hardened
beating yourself up
beta-Vinculin
bokmakieries
broadcast signal carriage
burning platforms
Callistephus chinensis Nees.
centrifugal blower
colyer
combined plus and minus sign
concatenated probes
construction tax
dig one's toes in
drinking problem
dutyman
echocardiogaph
Elatostema strigulosum
English Opening
explicit definition
family of confocal parabolas
faulted upfold
fellows in arms
flappingwing
freezing of a furnace
full-wave resistance welding power source
functionarism
gas scavenger
golitsyn
graphons
guarantee letter
hayhurstia atriplicis
heat bodied oil
Helcionellacea
hypermatrix
jenny-spinner
Kahneman
ld-50 (mld)
lebailly
light coin
low viscosity rubber
manufacturingemployee
marginal dealing
midbeamattack
mightve
moricella rufonota
mosquito-fleet
most and least
multiple-idler weigh carriage
Network Solutions
Nil al Azraq, Mudīrīyat an
nimblehanded
now, now
ossa peroneum
overtraveling
Pegu
permissively
photo-electrical effect
pinhole borer
piven
porous cell
pot-au-feus
pourri
profile lathe
rebrick
replenishing vital essence to improve eyesight
restart request
retecord
ruskins
sales by description
sfsrsessshs-s
Shortanbay
sociological jurisprudence
stadtholderate
stand-by heat
straight conveyer
sulphur cement
superalkali
syrphus fly
T-maze
temporofrontal
thallogens
the law lords
trepas
unapplianced
unlaughter-mild
unmystified
upper side
Verkhniy Kitat
waraunte
wave equation