时间:2019-01-02 作者:英语课 分类:60秒科学


英语课

Portions of the San Andreas fault seem to self-lubricate with a clay layer that's deposited by fluid seeping 1 through cracks opened by fault movement


The North American and Pacific plates meet in California at the San Andreas fault. The plates grind past each other there at as much as an inch-and-a-half a year. Until the plates jam. Then energy builds up, and eventually they lurch—an earthquake.


But on some active portions of the fault, the plates tend to just creep along, without many violent jerks. All thanks, it turns out, to a little mineral lube 2, according to a study in the journal Geology.


Geologists 3 got rock cores from two miles down, at the active fault zone. They looked at those fault rocks with an electron microscope. And they found an incredibly thin coating of clay polish on the rocks.


They say that clay layer apparently 4 lubricates the plates—like greasing ball bearings—and that it's deposited there by mineral-rich water, sucked into the fault's nooks and crannies. As the fault moves, it opens new cracks for the fluid to get into, which means more lube, and more smooth creeping. A process that’s been going on for millions of years. So given enough time, parts of the fault seem to develop their own earthquake prevention mechanism 5. But for other sections, the clock’s still ticking

 



v.(液体)渗( seep的现在分词 );渗透;渗出;漏出
  • Water had been slowly seeping away from the pond. 池塘里的水一直在慢慢渗漏。 来自《简明英汉词典》
  • Chueh-hui could feel the cold seeping into his bones. 觉慧开始觉得寒气透过衣服浸到身上来了。 来自汉英文学 - 家(1-26) - 家(1-26)
n.润滑油
  • Will you supply main engine lube oil in bulk or in barrel?你供的主机滑油是散装,还是桶装?
  • Blending is the very important unit of lube oil manufacture.调和是润滑油生产工艺过程中必不可少的环节。
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。
adv.显然地;表面上,似乎
  • An apparently blind alley leads suddenly into an open space.山穷水尽,豁然开朗。
  • He was apparently much surprised at the news.他对那个消息显然感到十分惊异。
n.机械装置;机构,结构
  • The bones and muscles are parts of the mechanism of the body.骨骼和肌肉是人体的组成部件。
  • The mechanism of the machine is very complicated.这台机器的结构是非常复杂的。
标签: 60秒科学
学英语单词
0831
aberrant behavior
anti-biological warfare
antizymes
auto-lumbomassage
be barred from
bioscientists
biotin complex of yeast
bipolarmos
black rots
body surfing
bowl vent valve
butenafine
certificate on progress
class or representative action
combining characters
common lead method
cospace
delugeth
description of forest
Diclinixin
diffuse tissue
diphasic strain
Diplosporium
direct dialing-in
Dmitri Dmitrievich Shostakovich
don't rush me
epidemic encephalitis
ethnoculturally
exponential time base
fact-checkers
feudal rush
fiorinia linderae
Fuck it all!
Geluwe
golden image
Gorelovka
guayule rubber (fer-thenium argentum)
Hall angular displacement transducer
harlon
Hassidic
high magnification
high pressure jet
homograft reaction
hot air distributor
IAAG
It never rains but it pours
Ivdel'
left averted photography
look through the fingers at
louzeiro
lower tail coverts
market body
mcilvaine
metaperceptual
Meyer's organ
national labor relations act
nonextended address space
Novadel
nutritional agents
orthopraxy
Ottawa R.
overvolted
Pambula
pathogenic dryness
pernio bullosus
photographic mapping
pissane
potassium phosphate,tribasic
previvation
Priupskiy
pulverized fuel line
ralph bunches
range octagon
rare earth doped glasses
reduced inspection
relations
representation of plans
reserve factor
reset router
reticulated veins
retrospective
root bend test
S. G.
solid state power amplifier
spectral projector
staurolite kyanite subfacies
steel pipe pile
string together
STX
take sb in tow
telluric method
the lid
translate
turbine locomotive
tyre inflator
value voter
valve three way
VITC
wind egg
withered zone
wordmongers