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
-trice
adult content filter
ahmets
American watercress
amita
ammonia poisoning
antigas training
blight canker
bureaucrats
C. W. H.
camera pad
centrifugal control
choak
choque
cladonia coniocraea
clavus vidualoides
combustion calculation
constant failure rate period
crosscut chisel
dimensionless representation
distorted perception
docked
dorgi
downiness
end matched specimen
endoxy-
environmental engineering
evadings
gas permeability constant
glacier stream
gloup
hydrocarbon type analysis
Imanga
in disrepair
in situ field measurement
IN-TF
information worker
inherent opening time
insectan
internal surface area
Isomperatorin
K Plate
key verification
Ladder Hills
linking jig
magnetooptic Kerr effect
makrut limes
material for cell lining
metal counterdie
methylinosine
Momia, Sa.
mouscrons
nissies
non - hodgkin's lymphoma
non-depreciable
nonmethylated
optional selective operator
Oulema melanopus
paraisopolar
plumulate
powder-filled
proline(Pro)
pulsebeats
pupillary
purple marshlocks
putrefier
Pyramus
Ranunculus triangularis
recognosce
regular spectral sequence
relocalize
retention efficiency
sacral canal
scandanavia
signal maintenance force
Souques's phenomenon
special surveillance
spherical distributions
spindle driving gear
steady hand
stock bin
substiles
superheated engine
system of earth science
the Black Hole of Calcutta
three phases
three-dimensional seismic raytracing
Timoptic-XE
Tribuloside
upper brick paving
vain name
valparaisoes
vascular abnormality of umbilical cord
vasoligation
virilescent
Vivaldi, Antonio
Welsh
wild flysch
worm-and-single-roller steering gear
yak-yakking
Yǒmsǒng
zanyism