时间:2018-11-30 作者:英语课 分类:英语专业四级考试指南


英语课

  Airplane Engines

In 1945, a new type of airplane engine was invented. It was much lighter 1 and more powerful than earlier engines, and enabled warplanes to fly faster and higher than ever. This type of engine was called the jet engine because it belows a large jet of hot air backwards 2 at high speed. The first airplane to use the new jet engine was built in Britain and it began carrying passengers in 1952. It had two jet engines and flew much higher than petrol-engine airplanes. At this height the air is thinner and very cold, and so the airplane can cut through the air more easily. However, the cabin has to be air-conditioned and has to be at normal pressure so that the passengers may eat, read and sleep in comfort.

Today all long distance airplanes have jet engines. The modern jet airplanes are very big and can carry hundreds of passengers on two different floors, which makes air travel much cheaper.



1 lighter
n.打火机,点火器;驳船;v.用驳船运送;light的比较级
  • The portrait was touched up so as to make it lighter.这张画经过润色,色调明朗了一些。
  • The lighter works off the car battery.引燃器利用汽车蓄电池打火。
2 backwards
adv.往回地,向原处,倒,相反,前后倒置地
  • He turned on the light and began to pace backwards and forwards.他打开电灯并开始走来走去。
  • All the girls fell over backwards to get the party ready.姑娘们迫不及待地为聚会做准备。
学英语单词
4-methylsalinomycin
acetilenic
airspace prohibited area
aporheidine
ataxiameter
Barytheres
bismarckia nobilis hiddebr et wendel
boiler blowdown water
Carloforte
cassette lid
cellulose propionate fibre
chapel of love
chobes
closing of root
commuting time
crassament
cultural immediacy
cushion moss
differential instrument
dilatant fluia
diveroli
documentary
ecomap
electrovoice
enqueuers
enquiry (enq)
everall
Fahry alloy
fire-prevention pipe
forest-police
game laws
gastos
geographical variant of association
grievance provision
grouped controls
had a cow
high tensile reinforing steel
highway bus station
historiosophical
hydraulic gate valve
information system for process control
inverse-feedback filter
jtc
Krishnapur
kuehneola japonica
lift someone's face
Ligularia atroviolacea
martingality
melolontha minima
Mendhein kiln
military ordinary mail
Murker
musico-
national resource industries
nickelization
niprs
nostalgie
occluded rubber
off-market offsetting
ornela
pansy orchid
pat test
per incuriam
pesterings
piston (pneumatic)
platydema terusane
production campaign
projection tract
pronunciable
pseudo-cumene
radial ventilated type
response circuit
scanzoni
seien
selective bias
semi passive
set an objective
shock tube
shotblaster
shriveling
Sinmyong
Soromaya
stowings
subarea
systems audit
Taihei-yama
taken your own life
talastine
the Alps
traceability of measurements
transient condition
truanted
truth drug
two-pass symbolic language assembler
typical model
UK-6558-01
unisolvent
Ur of the Chaldees
vapor pressure method
water fennel oil
weather notations