时间:2019-01-26 作者:英语课 分类:自然百科2012年


英语课

 There’re some basic things you should know about Mars before leaving home. Most days will be clear, and sunny and cold. The average temperature on Mars is as bitter as midwinter in Antarctica. And about half the diameter of the earth, Mars is a handy size. But it’s much less dense 1 than earth with about a third of the gravity. Surprisingly, the actual surface area is almost exactly the same as all the dry land on earth, shrunk together without the oceans. Build a few freeways and you could drive around Mars in a couple of weeks. 


 
And driving around Mars is exactly what planetary scientist Steve Squyres has been doing since 2004, not in person, but via NASA’s two off-road robot rovers – Spirit and Opportunity. 
 
“That’s like nothing I’ve ever seen before in my life.”
 
For all of us here on earth, the snapshots sent back by these forward scouts 2 are the next best thing to standing 3 on Mars in a spacesuit. 
 
“We very consciously give these robots some human like qualities. All the cameras are about, / this high off the ground, as same height as human eyes. It’s…the visual experience that you get from looking at the rovers’ pictures are, is intentionally 4 like what you would get if you were /looking at the visor of your helmet  in a spacesuit on Mars.”

a.密集的,稠密的,浓密的;密度大的
  • The general ambushed his troops in the dense woods. 将军把部队埋伏在浓密的树林里。
  • The path was completely covered by the dense foliage. 小路被树叶厚厚地盖了一层。
侦察员[机,舰]( scout的名词复数 ); 童子军; 搜索; 童子军成员
  • to join the Scouts 参加童子军
  • The scouts paired off and began to patrol the area. 巡逻人员两个一组,然后开始巡逻这个地区。
n.持续,地位;adj.永久的,不动的,直立的,不流动的
  • After the earthquake only a few houses were left standing.地震过后只有几幢房屋还立着。
  • They're standing out against any change in the law.他们坚决反对对法律做任何修改。
ad.故意地,有意地
  • I didn't say it intentionally. 我是无心说的。
  • The local authority ruled that he had made himself intentionally homeless and was therefore not entitled to be rehoused. 当地政府裁定他是有意居无定所,因此没有资格再获得提供住房。
学英语单词
acute oral lethal dose
alderperson
anuerobic respiration
Argentinean
Argolian
atomic level
attalee
auxiliary ledger
bay antler
break-mark
butylhydroxytoluene
Callitris glaucophylla
central argle
clipping divider
coete
concrete pillar
container wall
cytoplasmic sterility
deadweight valve
deaerator extraction pump
deal a blow at someone
discharging fan
discursive psychology
divided job processing
double injetor
eastern cricket frogs
Egyptian water-lilies
electric furnace of resistance type
elephant-headed
emblema
equal amount accrual method
Erquennes
exponential term
extra-fine fit
facilitiy
focused logging
forecast variance
forejure
formic ether
general-purpose floodlight
granitous
granulated iron
guild socialisms
gurdle
High Energy Physics Network
high-jinks
hoverbed
icfcs
iDollators
if-only
immunoglobulin delta chain
Incorporated Council of Law Reporting
incorporative
independently-operated double-acting clutch
indirect radioscopy
intermediale (or intermediate carpal bone)
Kabalo
katharometry
Langerhans'
lateral implantation
lateral lip
lautenburg
luminosity of flame
micro-micro farad
Midi-Pyrenees
milli-second
naphthol bottoming
netaglinide
NTR (nuclear test reactor)
paleomagnetic north pole
parrotfeathers
Peltandra
Petasiger
projector magazine
radar calibration unit
rayopake
receptor-ligand
sappan lignum
saw machine
sch?tzellite (sylvine)
secular culture
semi-stationary process
single turnout
special world intervals
spiderlines
steganalyzing
subgrammars
superheater-tube
surbased
swacker
Tabérou
tapes blecheri
tetrahexahedrons
touch football
transfer status
truckmaster
underconditioned
unsaid
vacuum corer
worf
wrap test
zero-sum games