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
a. testicularis
aczs
ahnha
allegro con spiritoes
Aracena, I.
astrochronology
auto-destructive
axonal reaction
back-up process
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beet steckling
bend in the channel
biune
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Bros.
brute force programming
Buckley, William F.
causevic
certified copy of cable
coherent reference
command definition language
concealed nail
condom use
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corneae racemosum staphyloma
corpora ossis sphenoidalis
cover-up
decadienal
deck carriage
dictyostele
dwarf ginseng
eight-pieces
Elops saurus
ever-smaller
extracochlear implantation
forward step
hand car
homophobophobia
hospitating
hover
invasion mud
jarosewichite
je
ko kha
kytheras
landing pattern
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log carrier
logic trouble-shooting tool
mallota haemorrhoidalis
mallotus repandus (milld.) muell-arg.
marylou
mercy killers
microdata
mootness
Moravský Beroun
multi stage storage pump
nelio
neuropathic atrophy
neutral line discharge theory
nominal spinning loss
non-manager
nonelectronic
nunataks
olde tyme
parabolic transition curve
photo counters
plumingware
pulse-length modulation
punchestowns
raucid
receiver monitor
recovery system
resonance vibration
sautering
scherzetto
selective interchangeability
shadow ROM
shculderless crown
show-bizs
single start ball screw
smooth down
spacecraft subsystem
spatial relation
sphagnum jensenii lindb.
step-by-step
strain measuring device
string warp machine
subgerminal process
superpol
sweande
Taiaroa Hd.
tasurinchi
the European Parliament
Tournaisian Age
travel sick
turn buckle
unmodulated keyed continunous wave
urban growth strategy
vennas
Vrsac
welliver