去激光子, 去激发光子, 制激光子

Sometimes it is hard to see the light, especially it lies in the invisible spectrum, like ultrared, ultraviolet radiation. But if you long to see the unseeable, you might interested to hear that under certain conditions people can catch a glimpse of

发表于:2018-12-24 / 阅读(177) / 评论(0) 分类 2015年Scientific American(一)月

A nightlight may keep those monsters under the bed. But it may also open the door to the blues. Because a new study reveals that animals exposed to light all night long show signs of clinical depression. If you have access to electricity, you no doub

发表于:2018-12-24 / 阅读(185) / 评论(0) 分类 Scientific American(十)月

DAVID GREENE, HOST: I mean, let's listen to this. (SOUNDBITE OF TV SHOW, STAR TREK: THE ORIGINAL SERIES) JAMES DOOHAN: (As Captain Montgomery Scott) Ready to transport. WILLIAM SHATNER: (As Captain James T. Kirk) Energize. D. GREENE: Yes, the familia

发表于:2019-01-16 / 阅读(226) / 评论(0) 分类 2017年NPR美国国家公共电台7月

But this still doesn't explain why light is able to pass through glass rather than being absorbed as with most solids. 但是这还是不能解释为什么光可以穿透玻璃而不是像其他大多固体那样被吸收。 For that, we need to go a

发表于:2019-01-17 / 阅读(218) / 评论(0) 分类 TED演讲教育篇
学英语单词
Alaharma
aminovaleric acid
anti Semitic
boraxes
boron compound
braided-wire
breathinesses
broach support
bromerguride
bronchitic tropica
by-pass feeder
camera body
chain stitch
channel band range
cliffhangs
Cuban blade
decsystem
degenerative process
delay clause
delphus
draught screen
dutch tulipmania
epidimic
ethyl nitroacetate
expression pattern
exsudation
eye-like gland
far advanced tuberculosis
farrers
fes (final environental statement)
file relative record address
fraternalized
fritted sand
front axle oil capacity
fuladectin
funginous
gauthier
good-faith
Great Basin
Haebang-ri
heterotopic bone
HIFR
high orbit
interior partition
intermediate enrichment stage
joint combined exchange training
kilgus
klystron vision amplifier
liegewomen
lightmaps
Lock the stable door after the horse is stolen.
low cover
low pressure polymerizer
LPSIS (low pressure safety injection system)
Magnolia wilsonii
marco poloes
mechanochemical degradation
megaripple
mellow consistency
mendelian population (dobzhansky 1935)
methoxypropanediol
milk-powder machine
neatifying
neo-calglucon
news envelope
news-man
October Revolution
operation of rolling
Ornithobilharzia
overhead application
practical work
put the squeeze on
quantity scrapped
quantum counter
radial wedging
regulation discharge of waterway
rotated dropping mercury electrode
sakuragi-cho
Sakurajima daikons
Scrofella
septolet
sharpness of separation
shop of traditional Chinese medicines
single spacing
socialist civil law
sortably
sound-emitting fireball
spell-checks
squeaklet
state equivalence table
sternal rib (or sternumal )
stink gypsum
support paper
textile dressing
to play hooky
tunneling cryotron
variolization
vector element
venous engorgement
vial
vitrinertite