时间:2019-01-23 作者:英语课 分类:探索与发现2012年


英语课

 Even the mastodon is buried here, a long dead relative of modern elephants. 


 
This was once a bear, but not like any bear in North America today. Claw marks gouged 1 into the cave wall showed the bear was not killed direct by the fall. It made a desperate attempt to climb back out. It was a short-faced bear, an ice age heavyweight. What else can we tell about it from its bones? Its weight was more than 700 kilos, twice that of a grizzly 2 bear today. Upright, it would’ve stood four meters tall. It was the largest flesh-eating mammal that ever walked the earth.
 
The Wyoming cave, appropriately christened natural trap, provides a unique window of the Ice Age. During its coldest era, much of North America was covered by huge ice sheets up to two miles thick, but as the continent began to warm, the ice sheets started shrinking. 
 
Corridors began to open up along the coast and through the mountains, letting people migrate south from Alaska for the first time. Before them lay the almost limitless great plains stretching all the way from the Rocky Mountains to the Mississippi River and beyond to Mexico.
 
Across this area, the shifting ice left deep scars on the land. They carved out thousands of lakes and ponds, and left the tapestry 3 of streams and rivers that drained the plains.

v.凿( gouge的过去式和过去分词 );乱要价;(在…中)抠出…;挖出…
  • The lion's claws had gouged a wound in the horse's side. 狮爪在马身一侧抓了一道深口。
  • The lovers gouged out their names on the tree. 情人们把他们的名字刻在树上。 来自《现代英汉综合大词典》
adj.略为灰色的,呈灰色的;n.灰色大熊
  • This grizzly liked people.这只灰熊却喜欢人。
  • Grizzly bears are not generally social creatures.一般说来,灰熊不是社交型动物。
n.挂毯,丰富多采的画面
  • How about this artistic tapestry and this cloisonne vase?这件艺术挂毯和这个景泰蓝花瓶怎么样?
  • The wall of my living room was hung with a tapestry.我的起居室的墙上挂着一块壁毯。
学英语单词
2G/DM
a whole new ballgame
achimedes's principle
admission velocity
alexin
architectual volume
automatic docket-printing facility
back-up overspeed governor
barber-surgeon
bookrests
borazines
cannahidivarin
clarke of atom
clientness
coincidence-reading device
continuous bulwark
crystal burn-out
cues
deckensystem
defective transducing phage
delay line registor
demoralisers
dhaulagiris
Dissen am Teutoburger Wald
dos-a-dos
drive element
film process
Fleming, Sir Alexander
forenames
gallantish
gas electrode
get one's foot on the ladder
government expenditure policy
half section
high lights
hipponix foliacea
Hortensia
hybrid digital-analogue circuit
ichthyomorphic
ilion
indexed I/O
indices of diffraction
Indy Car Series
inflationism
intermediate pressure compressor
intrasphenoidal
jump out of one's skin
lachish
lathe brush wheel
lived it up
Load Game
lower confidence limit
magnetic region
mammary fibroadenoma
mandinkas
memorializing
minimum premium
moisture eliminator
motioned
multiple absorption
Ninevites
oil residue
Organa genitalia feminina externa
outgoing trunk jack
Pavlov pouch
perfect duality
pert.
piezoelectric calibrator
pinfaensis
pneumatic electronic hydraulic system
pneunatic sand rammer
pressure-time method,Gibson method
proximate causes
pustejovsky
quasi-linear form
ransom bill
recurrent capsular cataract
rienda
riffled tube
Romahapa
Saul Steinberg
scubaing
sell up
silicon-controlled switch
SPACstation
spectral density tensor
staff only
teeth-tapping
three yoke of oxen
Tibergite
transonic shock wave
transport mark
Trizolin
Tsebelda
umass-boston
unit mold
valihas
volume compressibility coefficient
vowel quality
willow twig
wood nuthatch
Yakan, Mys