[建] 三甲醇乙烷

The children worked on the old desk all morning. After a lunch of grilled cheese sandwiches and coleslaw, they took a break to play Frisbee and cool off in the pond. It wasnt long, though, before they were hard at work once more. When Benny stopped t

发表于:2018-12-06 / 阅读(308) / 评论(0) 分类 105 The Mystery of the Orphan

What a beautiful garden, Jessie said. The other Aldens agreed as they helped Kate gather flowers the next morning. Kate looked pleased. Thank you, Jessie. My guests often help out with the weeding. They find it relaxing. She added some daisies to the

发表于:2018-12-06 / 阅读(302) / 评论(0) 分类 105 The Mystery of the Orphan

No sooner had the professor gone inside, than Lindsay stepped out the door. I thought Id find you here, she told the Aldens with a smile. I just wanted to let you know Ill be leaving in the morning. The children were surprised to hear this. You mean

发表于:2018-12-06 / 阅读(302) / 评论(0) 分类 105 The Mystery of the Orphan

AS IT IS 2016-10-17 Indian Police Make Arrests in Plot to Steal Money from Americans 印度警方破获美国公民诈骗骗局 Last week, Indian police arrested at least 70 people suspected of stealing money from people in the United States. 上周,

发表于:2018-12-08 / 阅读(305) / 评论(0) 分类 2016年VOA慢速英语(十)月

AS IT IS 2016-10-01 Report: Smoking May Permanently Damage Genetic Material 报告称吸烟或永久性损伤你的遗传物质 Here is another reason to not light up a cigarette. Smoking can permanently damage your genetic material, according to a n

发表于:2018-12-16 / 阅读(290) / 评论(0) 分类 2016年VOA慢速英语(十)月

This is Scientific Americans 60-Second Science. Im Cynthia Graber. This will just take a minute. Saliva contains many useful components: lubricants, enzymes for breaking down food and now compounds that can reveal a persons age. Thats according to a

发表于:2018-12-24 / 阅读(338) / 评论(0) 分类 Scientific American(六)月

Ever get a sour stomach after your morning coffee? Well, you might end up switching to a dark roastbecause that coffee concoction may leave you with a happier tummy. That's according to the research presented at the American Chemical Society meeting

发表于:2018-12-24 / 阅读(344) / 评论(0) 分类 Scientific American(三)月

The penguins stay when all other creatures have fled because each guards a treasurea single egg rested on the top of its feet and kept warm beneath the downy bulge of its stomach. There is no food and no water for them. And they will not see the sun

发表于:2018-12-27 / 阅读(252) / 评论(0) 分类 探索与发现2012年

You may have heard that humans and chimpanzees have something like 96 percent of our DNA in common. So why, then, are diseases like cancer so common in humans but so rare in chimps? If our DNA is nearly identical, shouldnt we be at risk for many of t

发表于:2018-12-28 / 阅读(303) / 评论(0) 分类 初学者听力文摘精选

M Madasiatic acid 崩大碗酸 Magnoflorine 木兰花碱 Magnolia cortex P.E 厚朴提取物 Magnolol 厚朴酚 Maitake mushroom P.E 灰树花提取物(舞茸提取物) Malonyl Oleanolic acid Hemi

发表于:2019-01-03 / 阅读(357) / 评论(0) 分类 医务英语

AGRICULTURE REPORT - Restrictions on Methyl Bromide By Mario Ritter Broadcast: Tuesday, March 16, 2004 This is Steve Ember with the VOA Special English Agriculture Report. Graphic Image Some chemicals

发表于:2019-01-06 / 阅读(372) / 评论(0) 分类 农业与发展

By Caty Weaver Broadcast: September 12, 2003 This is Bob Doughty with the VOA Special English Environment Report. Scientists in the United States have reported some good news about the 1)ozone in the

发表于:2019-01-11 / 阅读(355) / 评论(0) 分类 VOA2003(下)-环境与健康

But they are hungry and eager to reach their mother whos delayed feeding them on this special day. Now she lures them with the promise of milk, the only food the cubs have known since they were born, deaf and blind beneath the snow some two months ag

发表于:2019-01-23 / 阅读(298) / 评论(0) 分类 探索与发现2012年

Day 10. And the mother has let her cubs a mile from the den. Its time to put them to the test. Theyve grown enormously in confidence, but they dont have their mothers sense of urgency. At last it seems that they are ready for their journey. And they

发表于:2019-01-23 / 阅读(276) / 评论(0) 分类 探索与发现2012年

Midsummer on the tundra and the sun does not set. At these altitudes, the suns rays are glancing and not enough of their energy reaches the ground to enable trees to grow. Youll need to travel five hundred miles south from here before that is possibl

发表于:2019-01-23 / 阅读(259) / 评论(0) 分类 探索与发现2012年

As we travel south, so the suns influence grows stronger. And at 50 degrees of latitude, a radical transformation begins. Summers here are long enough for broadleaf trees to replace conifers. Broadleaves are easier to eat and digest, so now animals c

发表于:2019-01-23 / 阅读(293) / 评论(0) 分类 探索与发现2012年

The advance of the seasons brings constant change. As the suns influence diminishes in the north, so the deciduous forests of America begin to shut down, losing their leaves in preparation for the dark, cold months ahead. One season hands over to ano

发表于:2019-01-23 / 阅读(271) / 评论(0) 分类 探索与发现2012年

Deer are frequent casulties of the harsh winter. And these leopards are not above scavenging from a corpse. African leopards could never survive here. But the Russian cats have thick fur to shied them from the cold. There are only 40 Amur leopards le

发表于:2019-01-23 / 阅读(316) / 评论(0) 分类 探索与发现2012年

Science and Technology Epigenetics and stress Baby blues 科技 外因遗传与压力 新生儿蓝调曲 A mother's stress while she is pregnant can have a long-lasting effect on her children's genes 母亲孕期压力过大会对孩子的基因造成长

发表于:2019-01-26 / 阅读(373) / 评论(0) 分类 经济学人科技系列

Body Clock Provides Clues to Aging 生物钟提供衰老的线索 If youre searching for the fountain of youth, you might find it in your DNA. Thats according to a new study that sheds light on the biological clock ticking in our genomes, why our bod

发表于:2019-01-31 / 阅读(398) / 评论(0) 分类 VOA常速英语2013年(十月)
学英语单词
acceptance of freight
acusta plicosa
analysis of variance analog
answer print
aplosyenite
Aragos'disk
aurides
biocentral
biodosimetric
bistable laser
bizones
buhrstones
CALCT
candelight
case in point
castoreum oil
catalog listing
chemicals feed system
Chetwode
clytemnestras
compensator genes
computer-based educational administration
contubernial
coronavirus group ii rat coronavirus
crop-duster
current amplification factor
decoppering cleaning agent for gun barrel
diagnosis-specific
direct insertion mechanism
do martial arts
dosage rate
edible tulip bulb
electro-otoscope
farm property
feature-length
flat-feet
float-plated fabric
flouncers
foreign currency denominated debenture
fuel cam
granulomatous esophagitis
habor boat
heede
inner mongolia autonomous region
joint bid
kingdoms of cambodia
kneading method
laborhood
lovozerite
lullabylike
male-sterilant
marketing insurance
melanomycin
message volume
multidimensional attack
multiple chimney
mystic testament
nerillid
neurotubule
ngangela
nonhomologous
octoblepharum albidum
ogyrides orientalis
on the chance of
overhead travelling crane with hoist
parabolic relation
phonolite trachyte
phylocode
Processus retromandibularis
profit from amalgamation
protanoid
red-tailed hawk
s-type hydroturbine
schulmeyer
scientific issues
selenium cells
semiscald
Shiraz
sorbition
spiral-cutter
split phase starting
sports-page
square-root transformation
stain-repellent
strobane
substantial firm
symmetric estimation method
symmetrical powering
syncor
the passover
Thrombocid
tickings-off
timbrels
tombas
tourmaline pincette
unrounged
vipers
wait up (for)
warning tap
wild lupines
zinc-?copper battery