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
a circular letter
abilo
absolute pitch
acephalothorus
amplified spontaneous emission spectrum
archeobacteria
aroints
auxiliary air reservoir
BancoCompartamos
basis point.
be out of
bit shifting technique
buddies up
chemical individual
coated plastics
constant elasticity alloy
corrosion reaction
current taxation
cut a feather
Doctor of Pedagogy
Driliton
Drinit, Gjiri i
eigengrau
endways
Euler's dynamical equations
experimental precision
experimental program of education
faciate
filions
final port of discharge
Flockton
form line of thread
full penetration butt weld
gabbrite
Galways
Gareca
gazillions
geneware
giclee
give off vapours
Greece
halogen ovens
horizontal reset clock
hot filling
hydramyl ether
hydromelioration
initiary
isabnormal
jettison system
karbalas
laser speckle interferometry
leucogranite-aplite
light gours makes heavy purses
lush-worker
meiocardia vulgaris
methyl iodide
metroparalysis
mycotic intertrigo
N-acetylglutamate
Nippon Standard
nuclear fuel element
oil-extractor
optimal fire
pass-or-fail
please exchange
prairie gourd
prefectural road
promise rings
pseudcapsicum
pushe
range set
retrieval of technological information
Rochdale
sacroiliac
scorch tester
Se-baptism
Sedom, Har
sheath-core composite fibre
shipping index
shooting-iron
side-fired reformer furnace
slip-joint pliers
slurry impregnation
smell powder
Spr.
squiery
ST_military-and-armed-forces_the-navy
strike a lead
temperature range limit
top hopper
Trida
trimethylphenyl
triricinolein
tumor of urachus
twin carburetor system
Umët
under-prospect
unthawing
upon
Valid Visa
Venus Bank
wastewater purification plant