时间:2019-02-23 作者:英语课 分类:英语时差8,16


英语课

 Look at a map of Hawaii and you'll see volcanic 1 islands strung out like pearls on a necklace. The biggest--and the youngest--is Hawaii, in the south-east corner. As the islands stretch away to the north-west they become older and more worn. While Hawaii is about a million years old, the extinct volcano of Kauai on the north-west end is five times older.   The Hawaiian islands were formed by what geologists 2 call "hot spot" volcanos. These occur where hot magma from the Earth's liquid mantle 3 is steadily 4 forced through the Earth's crust. Hot spots can last for millions of years, staying in the same place while the plates of the Earth's crust move gradually overhead. The plates of the Earth's crust move at uneven 5 speeds, so when the plate moves slowly, this allows a tremendous volcano to build up. That's why we get a string of separate volcanos, rather than a continuous line.


This is exactly what's happened with the Hawaiian islands. The hot spot stayed in the same place, pushing up a string of volcanos as the Earth's crust moved over it. Because of this, the volcano on north-west Kauai is old and extinct, while the volcanos on Hawaii's south-east edge are the most active in the world.
The Hawaiian hot spot is now located about seventeen miles off the south-east coast of Hawaii. There's no new island there, but there is a huge, underwater volcano, rising almost three miles above the ocean floor. This new volcano will break the ocean's surface in about fifty thousand years, giving us our next Hawaiian island. 

adj.火山的;象火山的;由火山引起的
  • There have been several volcanic eruptions this year.今年火山爆发了好几次。
  • Volcanic activity has created thermal springs and boiling mud pools.火山活动产生了温泉和沸腾的泥浆池。
地质学家,地质学者( geologist的名词复数 )
  • Geologists uncovered the hidden riches. 地质学家发现了地下的宝藏。
  • Geologists study the structure of the rocks. 地质学家研究岩石结构。
n.斗篷,覆罩之物,罩子;v.罩住,覆盖,脸红
  • The earth had donned her mantle of brightest green.大地披上了苍翠欲滴的绿色斗篷。
  • The mountain was covered with a mantle of snow.山上覆盖着一层雪。
adv.稳定地;不变地;持续地
  • The scope of man's use of natural resources will steadily grow.人类利用自然资源的广度将日益扩大。
  • Our educational reform was steadily led onto the correct path.我们的教学改革慢慢上轨道了。
adj.不平坦的,不规则的,不均匀的
  • The sidewalk is very uneven—be careful where you walk.这人行道凹凸不平—走路时请小心。
  • The country was noted for its uneven distribution of land resources.这个国家以土地资源分布不均匀出名。
学英语单词
animal tissues
automatic low vacuum regulator
badrinath (badarinath)
Ban Mae Mo
biofilms
bit race
brain neurophysiology
carboxyl methyltransferase
celatis
ceramic gas turbine
chamfer needle
chili dogs
class division
cupric rhodanate
defense reactions
dentogingival unit
dermatate
dyer's greenweed
Earth Shoes, earth shoes
electrical system
envenomizations
erythroleukaemias
eucamptodromous
European Transport Law
excess demand curve
exercise in futility
eyases
flash-signal lamp
flatline
frame relay assembler dissembler
galvanized iron sheet weathering
gaouette
go out of date
gomorrahs
Greens Cut
hair molecule
henpecker
ho chi minh city (saigon)
horizontal band sawing machine
husband and wife
incended
infobond
iridallochrosis
karatavicin
Khamir
Kyiv
liquid fuel fired boiler
localized disturbance
Madre de Dios, I.
Manhattan cocktail
marine environmental hydrodynamics
metonym
microwave device
milk-sops
Mpbs
multiplicative operator
obligation relation
omniplane
operating loss
Oyrot Autonomous Oblast
palping foot
Pdn, public data network.
physiological reactions
plantation forestry
posterior lateral margin
propionate rule
Proteus americanus
pudus
reduced voltage starter
reinicke
RF in
Rubus macilentus
schedule algorithm
self acting control
sensitivity adjustment screw
series tripping
sewamono
Share scleroscope hardness
simple preposition
sinuous-header
slay level
solemnis
splashed lustre
spokestitching
starting barrel
strand dune
sulphindylic
tangertin
tappit
tasajo
tax assignment system
tax rate application
the elixir of life
tracheal rale
trihydroxy alcolhol
trim adjustment
vagilen
vallecular dysphagia
witha
yazh
ypthima esakii
zero standard