时间:2018-12-24 作者:英语课 分类:Scientific American(八)月


英语课

 This is Scientific American’s 60-SecondScience. I’m John Matson, got a minute?


 
Say you need a diamond. You could go downto the jeweler, or you could put some carbon deep underground and let it sitfor a couple billion years. Or you could hop 1 in a starship and cruise 4,000light years over to a dead star called pulsar J1719-1438. 
 
The pulsar is exotic on its own—it's a super-dense remnant of a star spinningat about 10,000 rpm. But far more curious is the world orbiting it, which mightbe called a planet if it weren't so strange.
 
It's about as massive as Jupiter, but much more compact. It may be the remainsof a carbon-rich white dwarf 2 star. But it's been mostly cannibalized by itspulsar companion, and is now just a shadow of its former self. 
 
The object’s incredible density 3 makes it subject to great internal pressure.And that pressure, acting 4 on the carbon-rich makeup 5 of the white dwarf, mayhave crystallized much of it to the particular form of carbon we call diamond.That's according to new research in the journal Science. The next step forastronomers is to find out if the diamond planet has rings.
 
Thanks for the minute. For Scientific American’s 60-Second Science, I’m JohnMatson.

1 hop
n.单脚跳,跳跃;vi.单脚跳,跳跃;着手做某事;vt.跳跃,跃过
  • The children had a competition to see who could hop the fastest.孩子们举行比赛,看谁单足跳跃最快。
  • How long can you hop on your right foot?你用右脚能跳多远?
2 dwarf
n.矮子,侏儒,矮小的动植物;vt.使…矮小
  • The dwarf's long arms were not proportional to his height.那侏儒的长臂与他的身高不成比例。
  • The dwarf shrugged his shoulders and shook his head. 矮子耸耸肩膀,摇摇头。
3 density
n.密集,密度,浓度
  • The population density of that country is 685 per square mile.那个国家的人口密度为每平方英里685人。
  • The region has a very high population density.该地区的人口密度很高。
4 acting
n.演戏,行为,假装;adj.代理的,临时的,演出用的
  • Ignore her,she's just acting.别理她,她只是假装的。
  • During the seventies,her acting career was in eclipse.在七十年代,她的表演生涯黯然失色。
5 makeup
n.组织;性格;化装品
  • Those who failed the exam take a makeup exam.这次考试不及格的人必须参加补考。
  • Do you think her beauty could makeup for her stupidity?你认为她的美丽能弥补她的愚蠢吗?
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air weapons controller
analytical geometry of space
antifungal factor
antihomomorphism
ball bearing shielded
BEOP
bilge board scow
cassone
castane
chelon
Chirico, Giorgio de
civilized behavior
civitas
clett
complementary arc
concentrate fresh milk
courtlike
coveners
crosswind stability test
crown of beam
decoster
densifications
dispatch tables
Elatolite
electro-optic transmitter
Empoundment
farm sth out
fi-lb
flint corn
forsung
free oil lubricating compressor
free-verser
fruge
gapest
grism
haematogeneses
halden
hammady
human interface technology laboratory
idumean
Impatiens toxophora
implementation of the transport level
inelasticity coefficient
initial test
integrated optical spectrum analyzer
intracanaliculi
issuable
italicus
Kartarpur
lexian distributions
lymphadenovarix
memorialized
mennonitisms
mental energy
microwave source
mole skin
networked community
Nicollella
noncontaminated atmosphere
objective behavior inventory
odd electron spin
order of dimensioning
oxygen fill valve
parathyroid tetany
penetrating effect
Philippopolis
pinto bean
platform end door
protoform
publicly
pyres
refractometric analysis
return-tube boiler
rounds per shift
Saiyid Mazār
short shut-down
simple and opposite
Sovkhoznyy
static convergence correction
subdelirium
sums up
super-short
superheater flue
swallow nest
taeniarhynchosis
tear gases
terry sole
thyristor brush
transfer tensor
underscan
unhaired hide
upper window edge
valerian fluidextract
vibration proofing material
vinactane
weigh on sb
without further ado
woonerfs
woronoff ring
wrapping-up
xerophytia
zamia pumilas