时间:2019-01-03 作者:英语课 分类:2018年VOA慢速英语(十)月


英语课

Ancient Bones Reveal Ancient Diet, Lifestyle


Scientists learned recently that fish was the main source of protein for people in southern Scandinavia many thousands of years ago. They also ate other animals that live in the water. The findings come from Lund University in Sweden. Scientists there tested ancient human bones from more than 80 individuals.


One of the researchers was Adam Boethius. He says by studying the chemistry of the bones, they learned the diet of the people they belonged to.


"Basically you are what you eat. And so when you study this -- stable isotopes 2 -- you get an indicator 3 of what the humans have been eating."


The study examined the importance of a mix of protein sources in the human diet from around 10,500 to 7,500 years ago. They found that in Scandinavia most of what people ate came from the sea.


Boethius said back then, fish made up 50 to 70 percent of the diet. He said other sea animals like seals and dolphins brought that percentage to almost 100 percent.


This research changed the understanding of how ancient people of the area lived. Earlier studies suggested these people hunted big animals and moved around a lot to follow them. But the chemical examinations did not show proteins linked to deer and elk 4 and other land animals of the time.


Boethuis said scientists now believe these people stayed in place for most of their lives and ate local food. The discovery, he argued, provides evidence that "settlements appeared in Scandinavia much earlier than researchers” once believed.


I’m Anna Matteo.


Words in This Story


stable isotope 1 – n. Stable isotopes are non-radioactive forms of atoms.


indication – n. something (such as a sign or signal) that points out or shows something


settlement – n. a place or region newly settled : a small village



n.同位素
  • The isotope ratio is directly used for comparing oils or gases.同位素比率直接用于比较各种石油或天然气。
  • How to apply a radio isotope?如何运用放射性同位素?
n.同位素;同位素( isotope的名词复数 )
  • the many isotopes of carbon 碳的诸多同位素
  • Tritium is one of the mildest radioactive isotopes. 氚是最和缓的放射性同位素之一。 来自《简明英汉词典》
n.指标;指示物,指示者;指示器
  • Gold prices are often seen as an indicator of inflation.黃金价格常常被看作是通货膨胀的指标。
  • His left-hand indicator is flashing.他左手边的转向灯正在闪亮。
n.麋鹿
  • I was close enough to the elk to hear its labored breathing.我离那头麋鹿非常近,能听见它吃力的呼吸声。
  • The refuge contains the largest wintering population of elk in the world.这座庇护所有着世界上数量最大的冬季麋鹿群。
学英语单词
a. perinealis
accrued charge
acoustic magnetic mine
adlecting
administration of internal affairs
Aflogualnum
ai chi
alternative procedure
ampholite
art and part
artificial caving
assidue
base of petroleum
black cottonwood
blue-green bacterium
bursting speed
cascading down
centricdiatom
cloud-bases
complementary scale
consistorial
conventional-arms
counter-cast
Crista sacralis intermedia
Cynwyl Elfed
Daphne holosericea
departmental arrangement and distribution in commodity stock
Direct Copper Blue 2R
disinflations
drip channel
event oriented simulation
eye-serve
factorization method
facular
Fentathienil
flower
geomagnetic periodic variation
go yachting.
group demodulator filter
harpending
hepatitis sequestrans
information management program
initial overburden pressure
insulation varnish
intrapore
inverse beta process
journal box lid hinge
lanatest
light pressure separator
Lothair
megalodiscs
merry-go-round
monoethanolamine(surfactant)
moving current-weighted Passche indexes
neutralizing water tank
new staff
Nihon-maru
non-specified-time relay
nuclear quadrupole spectrum
oil pressure switch
one-cancels-the-other order
orbit maneuver engine
output transfer function
Pare's suture
plain shank
plant hole
poikilosmotic character
preregeneration
progressive wave
pushback
put somebody up to
RCITR
reducing capacity
reductive alkylation
regional index call warrant
RFRNA
Rhodiola wallichiana
Richardson's ground squirrel
rosette phyllotaxy
semi-tractor
sexlessnesses
sgd.
shell tuck
sickling diathesis
simple deterministic language
spaces out
spantik
spread back
sugarcane top
system of gravitational unit
tea-tree
telephone bills
tiled mode
use test
vendibler
vertical decomposition
voltage and frequency response
wear plate
Y ligament
Yang Shiying
zori