时间:2019-01-08 作者:英语课 分类:Scientific American(八)月


英语课

There’s nothing like a good steak. And our Australopithecus afarensis ancestors apparently 1 felt the same way. Because new discoveries from Ethiopia show that what was likely the species of the famous fossil Lucy used stone tools to butcher meat from big mammals—about 3.4 million years ago. That’s a million years earlier than our best previous evidence for human ancestor stone tool use and meat eating. The finding appears on the cover of the journal Nature.


The research team found two fossil bones with cut and scrape marks, signs of meat carving 2. One bone was a piece of rib 3 from a cow-sized mammal; the other, a leg bone fragment from a mammal the size of a goat. The bones also had percussion 4 marks, sustained while Lucy’s friends smashed the bones to get at the marrow 5.


It looks like the ancient tool users collected stones that happened to have shapes conducive 6 to butchering, the way kids select particular stones with good potential to skip on water. But future expeditions will look for evidence for any attempts at shaping stones into kitchen utensils 7. Because after 3.4 million years, Lucy and her fellow afarensis keep surprising us.


Thanks for the minute. For Scientific American's 60-Second Science, I'm Steve Mirsky.

 



adv.显然地;表面上,似乎
  • An apparently blind alley leads suddenly into an open space.山穷水尽,豁然开朗。
  • He was apparently much surprised at the news.他对那个消息显然感到十分惊异。
n.雕刻品,雕花
  • All the furniture in the room had much carving.房间里所有的家具上都有许多雕刻。
  • He acquired the craft of wood carving in his native town.他在老家学会了木雕手艺。
n.肋骨,肋状物
  • He broke a rib when he fell off his horse.他从马上摔下来折断了一根肋骨。
  • He has broken a rib and the doctor has strapped it up.他断了一根肋骨,医生已包扎好了。
n.打击乐器;冲突,撞击;震动,音响
  • In an orchestra,people who play percussion instruments sit at the back.在管弦乐队中,演奏打击乐器的人会坐在后面。
  • Percussion of the abdomen is often omitted.腹部叩诊常被省略。
n.骨髓;精华;活力
  • It was so cold that he felt frozen to the marrow. 天气太冷了,他感到寒冷刺骨。
  • He was tired to the marrow of his bones.他真是累得筋疲力尽了。
adj.有益的,有助的
  • This is a more conducive atmosphere for studying.这样的氛围更有利于学习。
  • Exercise is conducive to good health.体育锻炼有助于增强体质。
器具,用具,器皿( utensil的名词复数 ); 器物
  • Formerly most of our household utensils were made of brass. 以前我们家庭用的器皿多数是用黄铜做的。
  • Some utensils were in a state of decay when they were unearthed. 有些器皿在出土时已经残破。
学英语单词
aging accounts receivable
all hours
aloos
aviation turbine fuel (atf)
belmen
Beshtasheni
beyond count
bluejackers
boat-yards
bruggenthies
calf bone
cartouch
Cavitas nasi ossea
central office terminal
chancing
circle setting knob
cortrophin
coursche
Cu.fra.
cutting operation
cycle of karst development
detail sensitive
diethylarniline
distortion of lattice
double R
draw bar load sensing mechanism
dutch elm funguss
eggen
enzymatic unhairing
fast-opening blind
fibre concentrator
flat valve
foraminulum
frasor
fuel container sipping heads panels
glide along
Grum recording spectroradiometer
H. & G.
hostageship
hydrobios
hyphenated compounds
impinge on sth
in-controlled spin
indirect damage
infirmaries
inkberry holly
insleeper
jeffereys
jensen formula
justae nuptiae
key-bed
Labican
legal organization
lexicalizable
lignivorous
loom race
low disparity binary code
low tape
magnetic plasma
mashie niblick
medicotechnical
mesoperidium
methyl amidophenol
Miliband
musculi occlusores spiraculorum
N-ethyl acetamide
nonminimal
Nosencephaly
osteochondritis of capitellum
outside guard beam
pizans
postentry education
poststimulation
pratik
pulled together
puppet valve
put out of ... mind
refractory slag
run after two hares
santoku
scroll drum
second order servo
sequence control statement
series structure
share entitlements
sharpen up your act
Simmons
slender body theory
steam quenching
support ledge
tersulfide
the constitutional convention
thermogalvaniccorrosion
unconvertible security
vickers hardness standard machine
Wagner's spot
Website marketing
West End
Would you please pass the salt
wyats
yolk sac sinusoids
youthlike