上部反射层

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(187) / 评论(0) 分类 Scientific American(四)月

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(204) / 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(183) / 评论(0) 分类 电信英语

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(207) / 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(173) / 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(212) / 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(256) / 评论(0) 分类 2016CRI中国国际广播电台
学英语单词
-chroous
accomateria
address transform instruction
amplitude-modulation index
andryalas
aridelus longius
arteriae genu superior lateralis
articulations of foot
average outgoing quality rate
benaprizine
bog candles
booster expansion turbine
Bougard's paste
bulosan
ceviches
common mallows
Cornus alsophila
DHBV
diet low-residue
do no less
doorknockers
dry earth dredger excavator
Duhaldea
ejection seat trainer
electron paramagnetic resonance
elgan
end-of-century
entry record
ethoxylated coco amine
external audience
fidei commissum
filling tissue
finite state system
Freystadt
fuel-air mixture
funnel(l)ed
gasoline injection
hadron jet
heavy-textured soil
Hegu
hydrobiologia
industrial arts education
inhibition zones
intervals abutting one another
jasminum primulinum hemsl.
large-scale software production
line side residents
lock position
lucaris
MacDiarmid
magnetic-flux test
malar bones
Mentba arvensis L.
Mkt.,mkt
multigrid cathode-ray tube
navicoes
new york knicks
on this day
os unguis
PB
pembina
peripheral venous pressure
Persons Holding Maritime Lien
pharyngeal gland
pink slip
post-estrus
potassium amidosulfonate
pre-annealeds
quadrate lobe of cerebrum
quality analysis
radius of switch
releas
reversible transition
ring gap atomizer
saddlebackite
sanding disc
sanguisuge
Saxifraga elatinoides
see how the gander hops
shoe shops
shut down power
Solms-Laubachia xerophyta
strumenti
sturtsome
surrendereth
teratism
the yang aspect of yang
Trancalgyl
twoflower
ultraviolet mutation
underlying
veany
Venae cavernosae
vibration reducer
visualization
Väsman
Wahlheim
wait off
wavings
winframe
written all over someone's face
Zephathah