[天] 太阳极紫外辐射

In 2008 astronomers discovered surprising amounts of water molecules where planets were forming near young stars. But how, they wondered, could those molecules survive? They should have been destroyed by ultraviolet radiation. In theory, planetary du

发表于:2018-12-02 / 阅读(94) / 评论(0) 分类 Scientific American(十二)月

诸多线索综合起来为我们描绘出一幅画面:那是火星遥远的过去,那时的火星还有着一层厚厚的大气层,令这颗星球温热暖和,从而使水能够在火星表面流淌。但如今,地表的水消失不见,而

发表于:2018-12-07 / 阅读(95) / 评论(0) 分类 60秒科学

HEALTH REPORT - Health: Looking for Skin CancerBy Brianna Blake Broadcast: Tue, 4 Jul 2006 16:00:00 UTC I'm Faith Lapidus with the VOA Special English Health Report. Tanning beds produce ultaviolet ra

发表于:2018-12-07 / 阅读(90) / 评论(0) 分类 2006年慢速英语(七)月

21 俄勒冈青蛙数量急剧减少的调查分析 DATE=5-11-01 TITLE=ENVIRONMENT REPORT - Oregon Frog Study BYLINE=Cynthia Kirk (Start at 59

发表于:2018-12-07 / 阅读(57) / 评论(0) 分类 自然探索

A summary of the physical and chemical nature of life must begin, not on the Earth, but in the Sun; in fact, at the Sun's very center. It is here that is to be found the source of the energy that the Sun constantly pours out into space as light and h

发表于:2018-12-12 / 阅读(94) / 评论(0) 分类 英语小短文

A summary of the physical and chemical nature of life must begin, not on the Earth, but in the Sun; in fact, at the Sun's very center. It is here that is to be found the source of the energy that the

发表于:2018-12-15 / 阅读(173) / 评论(0) 分类 新东方背诵文选

A summary of the physical and chemical nature of life must begin, not on the Earth, but in the Sun; in fact, at the Sun's very center. It is here that is to be found the source of the energy that the Sun constantly pours out into space as light and h

发表于:2018-12-30 / 阅读(64) / 评论(0) 分类 考研背诵50篇

Sunscreened Plants 遮光植物 A NASA researcher is finding that alfalfa plants grow more poorly when exposed to UVB -- ultraviolet B radiation from the sun. Learn more about sunscreened plants -- today on Earth and Sky. JB: This is Earth and Sky. Eart

发表于:2019-01-02 / 阅读(146) / 评论(0) 分类 (科普英语)Earth and Sky

This is Scientific Americans 60-Second Science. Im Steve Mirsky. got a minute? Earth-like planets have the potential to form around manyand perhaps mostof the nearest stars that are like our sun. Michael Meyer of the University of Arizona announced t

发表于:2019-01-08 / 阅读(90) / 评论(0) 分类 Scientific American(二)月

The clues are adding up to give a picture of a distant Martian past, when the planet had a thick atmosphere that was warm enough for water to stream on the surface. But now the waters gone, and the atmosphere is so thin that any water would boil away

发表于:2019-01-08 / 阅读(79) / 评论(0) 分类 Scientific American(十)月

The source of Energy A summary of the physical and chemical nature of life must begin, not on the Earth, but in the Sun; in fact, at the Sun's very center. It is here that is to be found the source of the energy that the Sun constantly pours out into

发表于:2019-01-08 / 阅读(126) / 评论(0) 分类 英语小短文

Halfway there, you bump into the Asteroid Belt. It is not like in the movies where you are dodging asteroids at every second. It is a The space is very big and the asteroids are a long distance apart, so you could travel through it quite safely. The

发表于:2019-01-08 / 阅读(66) / 评论(0) 分类 自然百科2012年

AS IT IS 2013-06-14 NASA Scientists Still Dream of, and Plan for, Human Travel to Mars From VOA Learning English, this is As It Is. Welcome back. Im Caty Weaver. On the show today, we look into the future of space exploration. The American space agen

发表于:2019-01-12 / 阅读(53) / 评论(0) 分类 2013年VOA慢速英语(六)月

Juno Spacecraft Enters Jupiter Orbit 朱诺号探测器进入木星轨道 American scientists cheered loudly as their spacecraft, called Juno, entered Jupiters orbit Monday night. Juno, welcome to Jupiter! The scientists are with the U.S. space agenc

发表于:2019-01-12 / 阅读(44) / 评论(0) 分类 2016年VOA慢速英语(七)月

物理学 statics 静力学 motion 运动 inertia 惯性 gravitation 引力 relativity 相对 gravity 地心引力 vibration 震动 medium (media) 媒质 frequency 频率 wavelength 波长 pitch 音高 intensity 强度 echo 回声 resonance 回声,洪

发表于:2019-01-17 / 阅读(70) / 评论(0) 分类 托福英语

The solar system is a hostile place. Earth is under attack from deadly cosmic radiation. Life here is only possible, because it's protected by the magnetosphere, an invisible force field that cocoons the planet. But new evidence reveals that this vit

发表于:2019-01-22 / 阅读(70) / 评论(0) 分类 自然百科2011年

In polar regions where the magnetic field is / weakest, auroras glow in the sky. These dazzling displays of colored lights form when solar particles slam into gases in our atmosphere causing them to glow. The stronger the solar wind, the more dramati

发表于:2019-01-22 / 阅读(77) / 评论(0) 分类 自然百科2011年

1 ASTRONOMY 天文 astronomy 天文学 astronomical 天文的 astronomical observatory 天文台 astronomer 天文学家 astrophysics 天文物理学 astrology 占星学 pseudoscience 伪科学 cosmos(universe) 宇宙 cosmology 宇宙学 infinite 无限

发表于:2019-02-13 / 阅读(59) / 评论(0) 分类 实用英语

From VOA Learning English, this is As It Is. Welcome back. Im Caty Weaver. On the show today, we look into the future of space exploration. The American space agency NASA has announced plans for a new effort to study the sun. And, NASA scientists are

发表于:2019-02-16 / 阅读(57) / 评论(0) 分类 英语语言学习

The Source of Energy A summary of the physical and chemical nature of life must begin, not on the Earth, but in the Sun; in fact, at the Sun's very center. It is here that is to be found the source of the energy that the Sun constantly pours out into

发表于:2019-02-25 / 阅读(72) / 评论(0) 分类 双语有声阅读
学英语单词
-browed
6-Purinethiol
Advanced Encryption Standard
advanced system concept
air circulating rate
altizide
andray
ATCAA
Bartoszyce
basic sour
batch and interactive network
besthoff
breezinesses
broad leaf tree
byasa polyeuctes termessus
car inspecting and repairing shed
chasten'd
chinese character coding technique
clean account
conditional formatting
coolant treatment plant
copiotrophs
cornopteris decurrent-alata
court procedure
cypraea caurica
DADS (data acquisition and display system)
Daras
distance correct plate
dunal
ejection seat mechanism
electrical resistance gauge
euro-federalisms
ffvs
Fissistigma acuminatissimum
fog prevention forest
free-form operation
genus Dactylis
graphic estimation method
hand-pulled
hardware multithreading
heating pulse
Hermitian
himantopus stilts
Impatiens atherosepala
initial survival draught
inland money order
intergeniculum
isopropoxide
key level control
kobeite
Körbecke
lathyrus pratenses
low-flowest
made something of oneself
Matut
medical frequency band
menglaensis
mercurial floor stand model sphygmomanometer
mesilla
microelectrolytic pump
minor neuralgia
Mokwa
muguruza
negro yams
niggerized
nova venecia
Nth.
oculophrenicorecurrent
on their ass
orogenic periodicity
other trades
paulsboro
peritoneal transfusion
phantasy life
pierre abelards
probable law
PROTO-O
ptloriss
quaverous
reception time
repolarisation
revision table
roller-head machine
sales service
salvatore
school crosser
sigalla
sinularia wanannensis
sputtering coating
take your hands off
tardiff
thermies
torvers
turks head rolls
tyrannicalness
Uluborlu
unballassed
unfashioned
unhelmeting
vitamin tablet
working hypothesis
Wüstenrot