棱镜反射镜;棱镜反射器

STEVE INSKEEP, HOST: Just about every American adult has heard the names Roe and Wade. Roe v. Wade was the 1973 Supreme Court decision legalizing abortion in the United States. Not so many people know about the real people involved, and now a new pla

发表于:2018-12-17 / 阅读(164) / 评论(0) 分类 2017年NPR美国国家公共电台1月

In 1970, the Soviet Union put a laser reflector on the moon, carried by a rover. A few months later, it disappeared. Some speculated that the rover had fallen into a crater or parked in such a way as to render the reflector inaccessible. Now after 40

发表于:2018-12-24 / 阅读(163) / 评论(0) 分类 Scientific American(四)月

The Government Communications Security Bureau (GCSB) is our spy organisation. At the moment, it can only legally spy on foreigners in New Zealand. However this organisation made a mistake spying on Kim Dotcom because he is a permanent resident. Also,

发表于:2018-12-31 / 阅读(163) / 评论(0) 分类 新西兰英语

据《科学》杂志报道,苏联的月球车40年前在月球表面留下了激光反射器,虽然经过多年的搜寻科学家始终没有发现激光反射器的踪迹。 4月22日,一组物理学家终于发现了来自反射器的微弱闪

发表于:2019-01-02 / 阅读(178) / 评论(0) 分类 60秒科学

Gain - This is an increase in signal power, due to a boost from an electronic device. Garbage - These are unwanted characters that appear because of either incorrect settings or noise. Gate - These ar

发表于:2019-01-03 / 阅读(164) / 评论(0) 分类 电信英语

Spectrum 光谱 Do you know what a spectrum is? 你知道光谱是什么吗? It is a series of colored lights. 它是复色光。 How can we see a spectrum? 我们怎么能看到光谱? When you see sunlight through a prism, you may see a rainbow

发表于:2019-01-10 / 阅读(165) / 评论(0) 分类 与美国小学生一起学英文第11册

Prisms 棱镜 Why can we see rainbows after rain? 我们雨后为什么能看到彩虹? We can see rainbows after rain because droplets of moisture in the air work like a big prism. 这是因为空气中的水滴就像一个大棱镜。 So what is

发表于:2019-01-10 / 阅读(152) / 评论(0) 分类 与美国小学生一起学英文第10册

歌曲:Katy Perry-Roar Roar, the first cut off of Katy Perry's upcoming album Prism, hit the airwaves last week and went right to the top of the Billboard charts (for digital songs). One person who is particularly fond of the song (besides everyone

发表于:2019-01-10 / 阅读(202) / 评论(0) 分类 英语娱乐八卦

The Five-hundred-meter wide Aperture Spherical Telescope, or FAST, is now operational in the mountains of Guizhou in southwest China. FAST has been designed to help Chinese researchers better understand our universe, as well as probe the cosmos for e

发表于:2019-01-19 / 阅读(186) / 评论(0) 分类 2016CRI中国国际广播电台

Bart's upstairs neighbor was driving him nuts. He made all kinds of strange noises at all kinds of strange hours. If I tell my neighbor he's noisy, he won't believe me, Bart thought. He'll believe me only if he lives downstairs and hears himself upst

发表于:2019-01-22 / 阅读(150) / 评论(0) 分类 英文短篇故事(纽约)

By Paul Sisco Washington 14 November 2007 At the McDonald Observatory in western Texas, a unique space program has been quietly underway for more than 30 years. It is called the Lunar Laser Ranging Program. VOA's Paul Sisco has more. Research scienti

发表于:2019-01-31 / 阅读(181) / 评论(0) 分类 VOA常速英语2007年(十一月)

The construction of the project was started in 2011 with an investment of 1.2-billion yuan, or about 180 million US dollars. The 500 metre Aperture Spherical Telescope, or FAST, is the size of 30 football fields. It's located in a hollow that was for

发表于:2019-02-21 / 阅读(220) / 评论(0) 分类 2016CRI中国国际广播电台
学英语单词
abolitionised
Acarnanian
Achsah
advanced exploration
advise of
anterior splenic vein
Bacillus canalis capsulatus
balance of potential
belong on
blue graft
boiled over
bound acrylonitrile
breaking free
bricken
business economic
calculation period
carry something too far
checked board weave
cranidiums
crawler mounted clamshell
culbert
cylindrical polar coordinates
deodourant
DFSG
dialling tone
direct air system
double-buffered data transter
drepanocytic anaemia
duratoin
ecosystem type
elastic interaction
elliptic cylinder function
eluvial phase
enourn
epigastric region
equilibrium inventory poisoning
fastest-acting
fruit(ing) body
furan(e) resin
genus Staphylea
geodetic frameworks
heel block
helium neon laser
herbaged
hersperidin
homogenization pipe
i-durked
immunoconjugates
in check
inner jar
internuclear potential
jakkalsbessie
josip
K-M
l'ombre
lenticular bob
logia
magnesianite (magnesite)
make your excuses
mat-ter
mate killers
Mýrasýsla
non inductive circuit
notch-bar fatigue test
office staff
oil based coating
optical spectrum analyser
parallel running test
passing the dividend
pastiming
Phenethiurn
pipe pliers
polyethersulphone
process time limit
prosperity peak
prove true
regional hydrology
rhyostomaturia
rings missing
rotary plug valve
row boom
sandspout
selenous chloride
semidemocratic
senior faculty
Statler, Ellsworth Milton
steganogram
structural disorder
subrent
sweep molding
teensiest
temperature-controlled package
thick-sighted
threshing cylinder
Travel and entertainment expense
trietazine
two-axle gear
twostep
Vickers diamond hardness
washi
wind velocity
Yapraklι