光锥;圆锥形光束

Grasp the 1) cone with the right hand firmly but gently between thumb and at least one but not more than three fingers, two-thirds of the way up the cone. Then 2) dart swiftly away to an open area, aw

发表于:2018-11-28 / 阅读(221) / 评论(0) 分类 疯狂英语2002年

Gamma Ray Observatory to Open Soon in Mexico 墨西哥建造伽马射线天文台即将开放 American and Mexican scientists have completed construction of the world's largest gamma ray observatory, situated high in central Mexicos Sierra Negra Moun

发表于:2018-12-16 / 阅读(95) / 评论(0) 分类 VOA标准英语2015年(四月)

Bring home a bucket of fried chicken and you may find that people have strong feelings about which part of the bird is best. Well, scientists at Washington University in St. Louis say the answer is: the eyes. At least when you compare them to our own

发表于:2018-12-24 / 阅读(103) / 评论(0) 分类 Scientific American(二)月

[00:06.37]Some people cannot see all colors correctly. [00:10.92]They cannot see all the colors in a rainbow or a sunset. [00:16.40]They cannot tell if the meat they are cooking is done or if a fruit is ready to be eaten. [00:23.61]Poor color sight a

发表于:2018-12-26 / 阅读(98) / 评论(0) 分类 美国英语听力80篇

The Blurry World Underwater When you open your eyes underwater, things look blurry, but with goggles, everything looks perfectly clear. Why cant we landlubbers focus underwater without goggles? First, we need to explore how our eyes focus when were h

发表于:2018-12-31 / 阅读(128) / 评论(0) 分类 英语听力文摘 English Digest

Night Vision And Humans: Why Cant We See Color? When we are in a fairly dark room, or outside at night away from lights, we can still see, but we cant see the colors of things very well. Why is that? There are two kinds of light-sensitive organs loca

发表于:2018-12-31 / 阅读(118) / 评论(0) 分类 英语听力文摘 English Digest

[00:02.17]Look around You看看你周围 [00:04.95]A very special teacher in a high school had a husband [00:09.80]who died suddenly of a heart attack. [00:12.54]About a week after his death, [00:14.83] she shared some of her thoughts with a classroom of

发表于:2019-01-02 / 阅读(234) / 评论(0) 分类 智慧背囊超越自我

吃鸡肉时,你知道鸡身上的哪个部分是最好的吗?科学家的回答是:眼睛。科学发现,鸡的视网膜锥(体) 数量比人类多,因此可以感知更多的色彩。 Super Chicken Vision Bring home a bucket of fried chic

发表于:2019-01-02 / 阅读(133) / 评论(0) 分类 60秒科学

A recent article titled Warning: blindness to breakout on a large scale within 3 to 5 years stated that viewing high-frequency blue rays increases the risk of eye diseases. 最近一篇名为《警惕:三五年后眼睛失明会大面积爆发!》的

发表于:2019-01-03 / 阅读(122) / 评论(0) 分类 实用英语

Rihanna在Victoria's Secret Fashion Show 2012现场演唱新专辑当中的冠单《Diamonds》,RiRi当天打扮的也十分另类,珍珠项链,就连眼镜也别具一格! 歌词: Shine bright like a diamond Shine bright like a diamond Fin

发表于:2019-01-03 / 阅读(88) / 评论(0) 分类 流行英文歌曲

This is Scientific American's 60-Second Science. I'm Steve Mursky. Got a minute? Orbiting around stars far far away is sand. Astronomers have found sandy particles circling a pair of stars about 2,400 light years from us. And they think they might be

发表于:2019-01-08 / 阅读(162) / 评论(0) 分类 Scientific American(三)月

A black sun has risen Look up into the sky Enter your rain season Drown out the light A return to the soil Harvest by hand Depleted and bleak in An unfertile land Is it fate or is it fortune That blasts our past to oblivion Can you feel The weight ha

发表于:2019-01-10 / 阅读(128) / 评论(0) 分类 英文摇滚歌曲

NASA to Launch Black Hole Hunter Black holes have a gravitational pull so intense that not even light can escape from them. As gas, dust and stars are sucked in, the material accelerates and heats up, generating powerful X-ray light emissions. Only a

发表于:2019-01-13 / 阅读(110) / 评论(0) 分类 VOA标准英语2012年(六月)

It started out as a feeling Which then grew into a hope Which then turned into a quiet thought Which then turned into a quiet word And then that word grew louder and louder 'Til it was a battle cry I'll come back When you call me No need to say goodb

发表于:2019-01-16 / 阅读(129) / 评论(0) 分类 影视英文歌曲

还记得孙燕姿那首红遍大江南北的《绿光》吗?翻越过前面山顶、层层白云,绿光在哪里?不知道有多少人跟小编一样,以为歌里的绿光只是对幸福的比喻。而其实在现实中,绿光是真实存在

发表于:2019-01-28 / 阅读(121) / 评论(0) 分类 实用英语

The question that naturally occurs is What would it be like if a star exploded nearby? Our nearest stellar neighbor, as we have seen, is Alpha Centauri, 4.3 light-years away. I had imagined that if there were an explosion there we would have 4.3 year

发表于:2019-01-29 / 阅读(100) / 评论(0) 分类 万物简史

As summer approaches we all enjoy outdoor activities. But with sunlight becoming more intense we should protect our skin from harmful direct exposure to the sun. 随着夏日的到来,我们都喜欢进行一些户外运动。但因为日照愈加强

发表于:2019-02-14 / 阅读(144) / 评论(0) 分类 中英双语新闻

Rihanna回归RB最新抒情单曲《Diamonds》 美国东部时间9月26日,天后rihanna发布了她第七张录音室专辑的最新单曲《Diamonds》。这首抒情曲《Diamonds》与她以往的火爆劲歌、洗脑电音不同,回归了RB。

发表于:2019-02-18 / 阅读(127) / 评论(0) 分类 经典英文歌曲

We were walking on sand that was fine-grained and smooth, not wrinkled like beach sand, which preserves the impressions left by the waves. 我们在很细,很平,没有皱纹,像海滩上只留有潮水痕迹的沙上行走。 This dazzling car

发表于:2019-02-25 / 阅读(125) / 评论(0) 分类 《海底两万里》中英双语有声读物

歌词: Shine bright like a diamond Shine bright like a diamond Find light in the beautiful sea I chose to be happy You and I, you and I Were like diamonds in the sky Youre a shooting star I see A vision of ecstasy When you hold me, Im alive Were l

发表于:2019-03-02 / 阅读(143) / 评论(0) 分类 英文最新流行歌曲
学英语单词
across-the-board increase
ahmose
arrival sequence access path
ask sb a question
auto-focusing
automatic built-in subroutine
battery packs
bicomponent fibre
black-flagged
blanking calender
blogstorm
Bolzano process
brain dusters
braking force coefficient
brasington
buccal fat pad
cast iron welding powder
chest-height diameter
cine-analyser
claymour
cleora injectaria
coldshoulders
colour-marks
composite break-even point
corn dabs
crotche
cryoprecipitating
dinnerplates
domestic pollutant
DSOB
dynamic frequency spectrum analyser
dynamic suction lift
eight convergent points
environmental temperature
final finsh
flame-cutting plant
Fujisan
full tone original
geodimetric
gnosiologically
gordonstouns
Hall converter
hallan
hamadryads
Hamilton cycle
hand-down
have an appointment at
heckle
hexacode
homicide by misadventure
if-tree processing
intermitten operation
intragovernmental
joint non-parametric confidence interval
klesches
launch pad transportation
malaysianite
manproductivity
metal-metal eutectic alloy
monosulfurons
multinest
mutagenics
Mutton Pie
n-ary predicate variable
Nandamuri
nerve blocking
network packet
nonsalient
one-terminal-pair network
os cox?
parishoners
phthalic imidine
Pogorzela
portal site
qor'an
rankly
re-sign
Rhus chinensis
rufflery
saberhagen
sand rose (desert rose)
sandblasting drum
shumard oaks
sphingids
spreckels
starch culture-medium
steering gear reduction ratio
stereo radio
stouthrief
subharmonic resonance response
Sud-Est, Dép.du
sumiyoshi odori (japan)
Thirty Years' War
tie trunk
tiltyard
trimness
two-sector economy
vagabonds' pigmentation
wrote up
Zatsarëvo
Zimmer splint
zoomorphosed