[化] 三氯硫化磷

Abby: hi, my name's Abby. What's your name? Colin: I'm colin. It's nice to meet you. What do you do? A: I'm a freelance English teacher. How about you? C: I'm in between jobs at the moment. A: what kind of job are you looking for? C: I'd like to find

发表于:2018-11-30 / 阅读(195) / 评论(0) 分类 生活英语情景口语

New Solar Cell Minimizes Environmental Risks in Manufacturing Process 新的太阳能电池减少生产中对环境的危害 Scientists in England report the development of a new solar cell that minimizes environmental risks in the manufacturing proc

发表于:2018-12-08 / 阅读(141) / 评论(0) 分类 VOA标准英语2014年(六月)

The little splints of wood which we call matches are made out of deal or pine wood which has been soaked in melted paraffin wax to make it burn more easily. 这种被我们称之为火柴的薄木片由欧洲赤松(松树)制成, 在液体的石蜡

发表于:2018-12-18 / 阅读(111) / 评论(0) 分类 英国学生科学读本

Have you ever had a problem getting a match to light? If so, you might be using the wrong type of match. There are actually two different types of matches: safety matches and strike-anywhere matches. 以前你点燃火柴时有没有点不着的时候呢

发表于:2018-12-18 / 阅读(99) / 评论(0) 分类 2018年NPR美国国家公共电台2月

This is Scientific American's 60-Second Science, I'm Christopher Intagliata. Got a minute? Life on earth requires six basic ingredientscarbon, hydrogen, nitrogen, oxygen, sulfur and phosphorus. Those six elements are the building blocks for DNA and R

发表于:2019-01-08 / 阅读(137) / 评论(0) 分类 Scientific American(十二)月

This is the VOA Special English Agriculture Report. Hogs at an Ohio farm Research shows that waste from pigs that are fed a special kind of corn may help a farmer's crops. And it also may help the environment. Any farmer who raises swine knows that

发表于:2019-01-11 / 阅读(167) / 评论(0) 分类 VOA慢速英语2008年(八)月

By Peter Fedynsky Moscow 18 July 2007 Officials in Ukraine are assessing the damage of a train crash in western Ukraine that sent huge clouds of burning phosphorus billowing into the air. The accident, which took place Monday, is raising health conce

发表于:2019-01-12 / 阅读(142) / 评论(0) 分类 2007年VOA标准英语(七月)

U.S. Vice President Joe Biden says he is withholding judgment on Iran's presidential election, as protests continue in Tehran over election results showing a landslide re-election victory for President Mahmoud Ahmadinejad. Vice President Joe Biden,

发表于:2019-01-13 / 阅读(163) / 评论(0) 分类 VOA标准英语2009年(六月)

By Sean Maroney Islamabad 28 September 2009 The head coordinator for the U.N. Humanitarian Affairs office in Pakistan says his agency is ready to handle what is expected to be a large number of families fleeing the South Waziristan tribal region as

发表于:2019-01-13 / 阅读(162) / 评论(0) 分类 VOA标准英语2009年(九月)

BBC Learning English Weekender Body image survey results Amber:Hello, I'm Amber, and youre listening to bbclearningenglish.com. In Weekender today, we listen to a report about a BBC survey of 25,000 young British people, asking about their body imag

发表于:2019-01-16 / 阅读(192) / 评论(0) 分类 Weekender

MARY LOUISE KELLY, HOST: Summertime brings algae blooms to many parts of the country - those mats of bright green organisms that can blanket waterways. In places like Florida's Lake Okeechobee, the blooms hurt tourism. They kill fish. They threaten w

发表于:2019-01-17 / 阅读(131) / 评论(0) 分类 2018年NPR美国国家公共电台7月

DAVID GREENE, HOST: Families across the United States are fighting with the federal government over a deadly chemical. Dozens of people have died from inhaling methylene chloride. This is an ingredient in common paint removers. NPR's Rebecca Hersher

发表于:2019-01-17 / 阅读(137) / 评论(0) 分类 2018年NPR美国国家公共电台11月

Every winter some twenty million tons of salt are dumped on America's road.That sodium chloride melts the ice, so it prevents its formatin, helping to prevent accidents. But road salt has its downside. This is not very economical because salt is main

发表于:2019-01-20 / 阅读(192) / 评论(0) 分类 2016年Scientific American(一)月

This week on Why Tell Me Why, we are finding out why the oceans are so salty. So the oceans are salty because the oceans have been around, lets say, for over five hundred million years. And over the course of time what we found out is that weve alway

发表于:2019-01-22 / 阅读(136) / 评论(0) 分类 自然百科2009年

The commercial potential for the stuffwhich soon became known as phosphorus, from Greek and Latin roots meaning light bearingwas not lost on eager businesspeople, but the difficulties of manufacture made it too costly to exploit. An ounce of phosphor

发表于:2019-01-29 / 阅读(120) / 评论(0) 分类 万物简史

有人叫她法国温婉天后,有人叫她疗伤天后,她的歌声,只要飘扬在空气中便能舒缓人的心灵。心情好,心情坏,只要有她的歌声嘴角便可生出微笑;是白昼,是深夜,只要跟随她的声线便能到达安祥所在。她就是Hlne Sgara。...... Encore une Fois(前缘再续)--Helene Segara

发表于:2019-02-03 / 阅读(216) / 评论(0) 分类 音乐咖啡厅

Tony: Who did you invite over for dinner Saturday? Carmela: I invited Keith, Sung, Stephanie, and Luis. Tony: You didnt! Carmela: I did. Why? Tony: Youre going to have a hard time cooking for them. Keith is a vegan and only eats food thats organic. S

发表于:2019-02-04 / 阅读(133) / 评论(0) 分类 地道美语播客

By Scott Bobb Lisbon 10 December 2007 The Africa-European Union summit ended Sunday in Portugal with agreement on many global challenges but with differences on other key issues. Correspondent Scott Bobb has this report from Lisbon. European and Afri

发表于:2019-02-07 / 阅读(182) / 评论(0) 分类 VOA常速英语2007年(十二月)

First off, I'll mention that at the bottom of the sea there exist veins of zinc, iron, silver, and gold whose mining would quite certainly be feasible. 首先,我对您说,海底有锌、铁、银、金等矿藏,开发并不是不可能的事。

发表于:2019-02-25 / 阅读(230) / 评论(0) 分类 《海底两万里》中英双语有声读物

Matches Striking matches, on this Moment of Science. Have you ever had a problem getting a match to light? If so, you might be using the wrong type of match. There are actually two different types of matches: safety matches and strike-anywhere matche

发表于:2019-02-26 / 阅读(122) / 评论(0) 分类 英语听力文摘 English Digest
学英语单词
ac conversion factor
adermykon
albinson
alkali amide
angel sleeve
antihuman blood serum
antipoet
Archea
Arzon
Belize Barrier Reef
BL Her star
catapultiers
cold water injection
command and control system
composite boson
conivium
cyberdiscursive
diagnostic related group
different regions
dolabid tablet
double circuit receiver
educational objectives
eight-line
electric quick saw
exanthema papulosum
executive sketch
fine pealite
flaxseed poultice
gas gas-cap
ghylls
Gien
glan
Gymnosphaera
halonen
height-index circuit
hydrotreat
indicated output
inspirational book
interstate river
interview expenses
Ipomoea tricolor
jamaat-i-islami
Kiku-gawa
kilo litre
klaprothite
L-Picein
Maldane
meander length
methylarsine dibromide
mickery
microfloc
middle corridor type dwelling house
morstad
national institute of standards and technology (nist)
noise-power-ratio
nonnatural language system
numeric representation
oil-hole
Oudemansiella
PackIT
pica em
pollen count
porous solid bed
primitivism
pro-welfares
prosecretin
pushing schedule
put ... into
rate of decompression
red blood cell life span
refracting prisms
retract a confession
ridley-thomas
salamone
sale on account
second-order Doppler shift
sense data
shuff
sigelman
sling sth out
smacker
Snares Islands
sphaceloma plantaginis
stacker full
stercory
stet dockets
substantial completion
sumilex
surface force
telesphere
tin-indium film
transmount
two tier market
untaes
urban ecology
UTLD
visible horizon
water world
Wender's test
whw
Xikuangshanian Age
zhisou powder