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(355) / 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(185) / 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(170) / 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(177) / 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(225) / 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(212) / 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(324) / 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(213) / 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(219) / 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(162) / 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(261) / 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(198) / 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(196) / 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(224) / 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(223) / 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(184) / 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(253) / 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(229) / 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(213) / 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(208) / 评论(0) 分类 英文最新流行歌曲
学英语单词
8-cells
a run on a bank
A-ESOTROPIA
air space control
anchor splint
ballpoint
base band bank
bone-conduction
brachykerkic
breitburg
broaching load
broadbean weevil
callicarpa formosana longifolia
cede
Cefradal
chairpersonship
Chiang Khong
chlorohydrination
chuddy
circatrigintan
Citizen's Advice Bureau
COCCOPDEA
commodity paper
complex vector bundle
crystal magnetic anisotropy energy
curved blade pole
dam axis
dartoic myoma
dedalus
dreamiest
endoscopies
ephestias
equity to a settlement
equivalence of quadratic forms
escargatoires
fast neutron spectrum
front-end security filter
gargouillade en dedans
Grindleton
guardsman
gyroporus longicystidiatus
Góis
high-ability
high-grade securities
holy person
image arc furnace
immobilisers
insurance quote
invasion diameter
ion type vacuum pump
klammath weed
lamiation
LDRI
licking
lower sideband upconverter
lucilia porphyria
magnetic compensator assembly
material survey
maximum length sequence
Mighty Compact
monochromating spectrometer
morphological accent
motor generator arc welder
Myrsine seguinii
Nasser City
neoskiodon
normally on device
oligosiloxane
operating valve cap
parapraxes
path compression
polarity relay
pookey
posterior orbital vein
pressure vessel
principle of microscopic reversibility
pseudo-individual
radiological air pollution
radwaste
retaken
rock auger
run hard to
sad clown
sawing machines for woodworking
scattering mechanism
sensor technology
separative work unit(SWU)
sideromagnetic
Smz alloy
spheric distribution
suberine
subsonic transport
toughmindedness
triple century
tunnel shaft bearing
unhrc
urethritis venerea
waveform relaxation method
wesing
withdrawal period
Wolff rearrangement
xenogiology