时间:2019-01-22 作者:英语课 分类:自然百科2011年


英语课

 We are at a foundry here, and they are pouring molten iron from all machinery 1. And they are going to make parts for new machines out of that iron, so they are recycling yet, but all that iron was created and ejected into the cosmos 2 by gigantic stars that exploded as supernovae. Those explosions created the iron and ejected into the cosmos, and then they got incorporated into planetary systems like ours, but ultimately the atoms of iron were created by exploding stars. Supernovae are the industrial zones of our star city, cosmic foundries in which the chemistry of the heavens forges new elements. 


 
 
 
It is fascinating to realize that the heavy elements in our bodies, the carbon in our cells, the calcium 3 in our bones, the oxygen that we breathe, the iron in our red blood cells. All of those heavy elements were synthesized, created through nuclear reactions in star, and ejected into the cosmos by supernovae. 
 
 
 
Only some stars are massive enough to die as supernovae. Most, like our sun, suffer a more gentle death. Most stars don’t die in the cataclysmic explosion. Our own sun, for example, a typical star, will die with a whimper not a bang. 
 
 
 
The death of most stars occurs when the battle, between gravity pulling in and nuclear energy pushing out, is won, not by gravity but by the nuclear energy.

n.(总称)机械,机器;机构
  • Has the machinery been put up ready for the broadcast?广播器材安装完毕了吗?
  • Machinery ought to be well maintained all the time.机器应该随时注意维护。
n.宇宙;秩序,和谐
  • Our world is but a small part of the cosmos.我们的世界仅仅是宇宙的一小部分而已。
  • Is there any other intelligent life elsewhere in the cosmos?在宇宙的其他星球上还存在别的有智慧的生物吗?
n.钙(化学符号Ca)
  • We need calcium to make bones.我们需要钙来壮骨。
  • Calcium is found most abundantly in milk.奶含钙最丰富。
学英语单词
2'-phosphodiesterase
a cutie pie
abnormal focal length
aggregation of individual preferences
air inlet valve of dredger's deliving pipeline
air-guns
alcala de la selva
archeri
Ariquemes
assinie
Auberger blood group system
Banbayan Pt.
bar rack
be food for worms
between-class correlation
Brachypodium sylvaticum
calex
capon test
carbon steel
catch copy
Central I.
chantha
chromophobic
couchful
day disk
deformational stress
detonation point
deutscheland
drive out of
duramatral
echymose
Elephanta Island
expected yield
fadged
fermentation inhibitor
floating point unit
folded and grooved seam
go hard or go home
half titles
harker lines
hideosities
Higher bid
imperialls
insinuate
iris detachment
Jeans viscosity equation
lactocidin
lbgs
lead metasilicate
left atrium failure
Liberation Tigers of Tamil Eelam
lock cylinder
loi-cadre
M.H.R.
macromitrium ferriei
marie dolores eliza rosanna gilberts
membranogenesis
mesh side cutter
Minskian
nodes
nonitemized
normal congruence
observantially
order parameter
pachometers
papular pruritic gloves and socks syndrome
paroxysmal coliky pain
patent licence-agreement
Phulsāri
pioneering work
plain ashlar
plant ledger card
pork fillet
preconising
PSD (power spectral density)
ragtop
relish
residual valency
Santa Maria, I.
satish
scientific data processing
search and seizure
Seawater Quality Standards
sharpness of focusing
side-by-side
Simonart band
Sleepwell
smazes
spherochromatism
starch slurry
stop-and-direction-indicator-lamps
storage cathode ray tube
sweetkin
tabby-cats
teamkillers
tetracontagons
tip clearance area
Tossåsen
uppermost part
us sea
water ejection tube
you're a star