时间:2018-12-24 作者:英语课 分类:Scientific American(七)月


英语课

 This is Scientific American’s 60-Second Science. I’m Cynthia Graber. This will just take a minute.


 
Medieval armor certainly looks heavy. And now researchers have demonstrated how the protection might have unwittingly put its wearers at a heavy disadvantage on the battlefield.
 
An armored combatant in the 1400s had between about 60 to 110 pounds of steel on his head and body. The scientists wanted to know how that weight affected 1 performance. They recruited battle experts from the Royal Armouries Museum in Leeds, in the U.K., who got into replicas 2 of four types of European armor.
 
The weighted warriors 3 then walked and ran on a treadmill 4 while the research team measured their oxygen intake 5. Wearing the armor turned out to be a much greater burden than carrying the same weight in a backpack. Because the distribution of weight in the armor requires the wearer to use more energy to swing his arms or move his legs. The scientists published the research in the journal Proceedings 6 of the Royal Society B. 
 
Armor wearers also wound up taking short, shallow breaths rather than the deep breaths associated with regular exertion 7. The researchers say that the tight, metal shell may have made the soldiers feel safer. But being weighted down probably made it a long day for a knight 8.
 
Thanks for the minute. For Scientific American’s 60-Second Science, I’m Cynthia Graber.

1 affected
adj.不自然的,假装的
  • She showed an affected interest in our subject.她假装对我们的课题感到兴趣。
  • His manners are affected.他的态度不自然。
2 replicas
n.复制品( replica的名词复数 )
  • His hobby is building replicas of cars. 他的爱好是制作汽车的复制品。 来自《简明英汉词典》
  • The replicas are made by using a thin film of fusible alloy on a stiffening platen. 复制是用附着在加强托板上的可熔合金薄膜实现的。 来自辞典例句
3 warriors
武士,勇士,战士( warrior的名词复数 )
  • I like reading the stories ofancient warriors. 我喜欢读有关古代武士的故事。
  • The warriors speared the man to death. 武士们把那个男子戳死了。
4 treadmill
n.踏车;单调的工作
  • The treadmill has a heart rate monitor.跑步机上有个脉搏监视器。
  • Drugs remove man from the treadmill of routine.药物可以使人摆脱日常单调的工作带来的疲劳。
5 intake
n.吸入,纳入;进气口,入口
  • Reduce your salt intake.减少盐的摄入量。
  • There was a horrified intake of breath from every child.所有的孩子都害怕地倒抽了一口凉气。
6 proceedings
n.进程,过程,议程;诉讼(程序);公报
  • He was released on bail pending committal proceedings. 他交保获释正在候审。
  • to initiate legal proceedings against sb 对某人提起诉讼
7 exertion
n.尽力,努力
  • We were sweating profusely from the exertion of moving the furniture.我们搬动家具大费气力,累得大汗淋漓。
  • She was hot and breathless from the exertion of cycling uphill.由于用力骑车爬坡,她浑身发热。
8 knight
n.骑士,武士;爵士
  • He was made an honourary knight.他被授予荣誉爵士称号。
  • A knight rode on his richly caparisoned steed.一个骑士骑在装饰华丽的马上。
标签: sss 托福素材
学英语单词
abnormal phoneme
aestuum
alternative carriage
anal operculum
antiarachnolysin
backstair
banana kicks
barenboim
be under review
BISCS
bow mechanism
bursae iliopectinea
Chladni
chromium tungstate
compound oil
concentrated evaporator
conical gauge
conpsoromic acid
convergence region
countryish
debit credit mechanism
delayed time-base sweep
disarmings
discredits
distinctiveness ratio
electropositive
erewhile (s)
extended field
filament blend yarn
Flumezin
foreappoint
forest goats
formation signal
frontal-contour chart
Gaius Julius Caesar
Galton's delta
gastrique
generalife
Gentianopsis holopetala
get ... on
gnathoscope
Guy's pill
Huschke's valves
hyperegy
integrated tug-barge
it feels like
kalioun
karagandas
Kievites
KING (Kinetic Intense Neutron Generator)
layman management
line control word
lobotess
lobularities
luci
magnesium carbonate
Makhāmīr, Jab.al
microwave dryer
mimoplocia notata
MIRAPINNIDAE
modern drama
nandrolone phenylpropionate
nonimplant
Olovyannaya
one quadrant convertor
optical parallelism
overhead
p-hydroxyphenylpyruvic acid
pendler
PHLA
placida dendritica
predicator
production engine
provisional acceptance
purophobia
requisite book
reverse-commutes
rule with an iron fist
Sikkim holly
siliceous geyserite
solid error
solid lubricant
solubility parameter
spermatozoon (pl. spermatozoa)
spray chemical
stationary tangent
Stenshuvud
subdivision rules
taxation theories and principles
the Demerara
thinkos
tidal zone biology
timber drying
tropical air mass
true income
undilating
US Coast Guard
Wii Sports
wolf jaw
xterra
yard craft