[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(182) / 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(226) / 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(202) / 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(174) / 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(183) / 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(168) / 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(165) / 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(191) / 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(210) / 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(202) / 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(178) / 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(240) / 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(258) / 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(233) / 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(203) / 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(236) / 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(201) / 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(217) / 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(219) / 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(173) / 评论(0) 分类 英语新闻
学英语单词
accumulation layer
advance sign
alignment in dock
anti-side-tone
antithets
armrings
atrovents
auripigment (aupiment)
austriacus
auto companies
Ballabgarh
bathmeter
bertiger
black tin steel
boom box
Botera
boundedness of rolling motion of ships
cabey
cobalt(ii) selenide
collection of tax
copyright piracy
costumier
cross stitched belt
de facto liberalization
dermatitis skiagraphica
Dibrompropnmidine
Dustin
ENTOMOTAENIATA
family mytilidaes
fexofenadine
file dump
focis
focusing mark
GSMA
hereditary cerebellar ataxias
HF process
HFRB
high-rent
Huayna Capac
hydatid polypus
hyperadrenocorticisms
infernal circle
inhibit
interference fit
interior shaft
international safetynet
jack-king flip-flop
khayyams
knowles dobby
lana
Lordstown syndrome
Matrand
mesoposition
mocoa
muscular structure
non-straightforward
oil source rock
open-heart surgery
optimal bias
organic extrusion
paleron
palpatory percussion
passouts
pinus serotinas
pitch-hole
plan of application
plosivity
possessive
poteron
prs.
pseudo-nitriding
pullayle
puts-on
reflection law
runoff and soil loss
runway guidance
Sarvāb
scopinast
sebaceous lymphadenoma
sek
Shechina(h)
spherical polisher
steel shovel
stereocaulon vesuvianum kilimandscharoense
stop payment of salary
Syzygium formosanum
tacho-torquemeter
takings
tendoplication
think before you speak
throw at end of points
thump a big drum for
tinniment
tricultures
trophy kid
uncontrolled missile booster
unverbalizable
vaccinum vacciniae
volume permeability
welcome back
wrist-spinner
you know something?