时间:2018-12-05 作者:英语课 分类:托福听力短文


英语课

(woman) Thank you. It's great to see so many of you interested in this series on "Survival in Outer Space." Please excuse the cameras - we're being videotaped for the local TV stations.


Tonight I'm going to talk about the most basic aspect of survival - the space suit. When most of you imagine an astronaut, that's probably the fist thing that comes to mind, right? Well, without spaces suits, it would not be possible for us to survive in space. For example, outer space is a vacuum - there's no gravity or air pressure; without protection, a body would explode. What's more, we'd cook in the sun or freeze in the shade - with temperatures ranging from a toasty 300 degrees above to a cool 300 degrees below zero Fahrenheit 1.


The space suit that NASA has developed is truly a marvel 2. This photo enlargement here is a life-size image of an actual space suit worn by astronauts on the last space shuttle mission. This past is the torso - it's made of seven extremely durable 3 layers. This thick insulation 4 protects against temperature extremes and radiation. Next is what they call a "bladder" of oxygen - that's an inflatable sac, filled with oxygen, to simulate atmospheric 5 pressure. This bladder presses against the body with the same force as the Earth's atmosphere at sea level. The innermost layers provide liquid cooling and ventilation. Despite all the layers, the suit is flexible, allowing free movement so we can work.


Another really sophisticated part of the space suit is the helmet. I brought one along to show you. Can I have a volunteer come and demonstrate?



1 Fahrenheit
n./adj.华氏温度;华氏温度计(的)
  • He was asked for the boiling point of water in Fahrenheit.他被问到水的沸点是华氏多少度。
  • The thermometer reads 80 degrees Fahrenheit.寒暑表指出华氏80度。
2 marvel
vi.(at)惊叹vt.感到惊异;n.令人惊异的事
  • The robot is a marvel of modern engineering.机器人是现代工程技术的奇迹。
  • The operation was a marvel of medical skill.这次手术是医术上的一个奇迹。
3 durable
adj.持久的,耐久的
  • This raincoat is made of very durable material.这件雨衣是用非常耐用的料子做的。
  • They frequently require more major durable purchases.他们经常需要购买耐用消费品。
4 insulation
n.隔离;绝缘;隔热
  • Please examine the insulation of the electric wires in my house.请检查一下我屋子里电线的绝缘情况。
  • It is always difficult to assure good insulation between the electric leads.要保证两个电触头之间有良好的绝缘总是很困难的。
5 atmospheric
adj.大气的,空气的;大气层的;大气所引起的
  • Sea surface temperatures and atmospheric circulation are strongly coupled.海洋表面温度与大气环流是密切相关的。
  • Clouds return radiant energy to the surface primarily via the atmospheric window.云主要通过大气窗区向地表辐射能量。
学英语单词
abductor ventralis muscle
acta
Ad Dukaydik
aerothermochemist
avon
basic categories of soil classification
be brought on the carpet
binding attachment
blow doors
bought in
brain surgeons
bryozoan
catches fire
class Cyanobacteria
clastobryum glabrescens
communistery
conchairamine
conjugate diametral plane
courtesy phone
cyclohexanone resin
direction to a jury
distance along the quasiorthogonal
doryl
dumb card
dye penetrant process
eakleite (xonotlite)
ecclesiasts
eddylike
elevon area
emptyish
energy-transfer equation
entrepreurialism
Ephedra rhytidosperma
erre
evaluation of merchandise
even grained texture
field check
frequency range expanding method
generalized Ohm's law
genter
genus bombaxes
Ghilarza
God's bones
graylisting
Hastie, William Henry
heidepriem
heterofermentangium
hinge type connection rod
induction type ammeter
Joule-Thomson valve
let there be
linearly polarized light output
loose-lifting piston
Lukovit
lusader
madryam
magnetoelectric transducer
maladie du sommeil
metal faced joinery
Mezzanego
mis-fired
Mlles.
Neu-Anspach
normal bonded-phase chromatography
Oratorio San Antonio
ovarian condition
package policy
pill mass roller
pindicks
plastic wax
Prehensile-Tailed
primapterin
printed circuit wiring
product motives
projectile-vomiting
pupping
reefous
roundness grade
routineness
scope of repairing course
second doctor
Serpentine Hot Springs
shofars
sodium tetraphosphate
spunking up
Stew in your own juices
stimulation therapy
syncephalis formosana
Tazolé
TDM bus switching
temperature-induced
the crown of the year
the watches of the night
tradeable
trellis post
trench mouths
tricuspid valves
two-cycle coast
unduly burdensome
vasa sanguinea retinae
Winthrop Harbor
wittner