时间:2018-12-31 作者:英语课 分类:英语听力文摘 English Digest


英语课

   Lightning Helps Fertilize 1 The Soil


 
  Our bodies need protein, and proteins contain nitrogen. The air we breathe has plenty of nitrogen to satisfy our needs. But—that nitrogen is not available to us directly from the air. The only way we can get nitrogen is from the plants we eat, or from the animals we eat that eat the plants.
 
  Here’s The Problem:
 
  A nitrogenmolecule in the air consists of two atoms which are held together very tightly. In order for us to absorb nitrogen, the two atoms must be separated. But the two atoms are held together so tightly that our body chemistry does not have enough energy to process them.
 
  This is where lightning comes in. Obviously we don’t have to be struck by lighting 2 in order to satisfy our need for nitrogen!
 
  However, in a thunderstorm there is enough electrical energy in lightning to separate the nitrogen atoms in the air. Once the atoms are separated they can fall to earth with rain water, and combine with minerals in the soil to form nitrates, a type of fertilizer.
 
  The nitrogen-containing nitrates in the soil are absorbed by the plants, and when we eat the plants or the animals which eat the plants, we get the nitrogen in a form which our bodies can use.
 
  So, in addition to providing a spectacular light show, and scaring us to death, lightning also helps fertilize the soil.

v.使受精,施肥于,使肥沃
  • Fertilizer is a substance put on land to fertilize it.肥料是施在地里使之肥沃的物质。
  • Reading will fertilize his vocabulary.阅读会丰富他的词汇。
n.照明,光线的明暗,舞台灯光
  • The gas lamp gradually lost ground to electric lighting.煤气灯逐渐为电灯所代替。
  • The lighting in that restaurant is soft and romantic.那个餐馆照明柔和而且浪漫。
学英语单词
ablative flashlamp
acid amide
actinomyce-antagonist
adsorption-desorption
all-over oneself
allowable unit stress for bending
ampliphase modulation
anacolouthon
asymmetrical current
atriss
beat the wind
boettner
bottoms-of-the-league
burst blanking
caranx deliecatissimus
cephalometry
constant market price
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Corydalis wilsonii
crooklyn
crossmembers
crusher primary
Cumaova
Derrygoolin
dip from
Ennersdale
enricheth
enterfere
equal-opportunity
fineberg
finite straight line
fistula in ano
Flumadine
force drying
G-strings
Gabriel reaction
gas distributing system
genral routine
glued insulated joint
got into a temper
holonet
horizontal particle
ichthyosis thysanotrichica
karasugite
Las Hurdes
lithistid
liver bird
magnetic field due to magnet
map room
marshbucks
maxes out
mertes
milk snakes
minor elements of sea water
molybdenum hexacarbonyl
monochrome display adapter
Mozillian
muletas
mupirocin
nondry
oil sediments
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optical mixing rod
original pressure
outer product expansion
packing tightening
penskes
Phosphate minerals
pissery
pitfuls
quick spindle adjustment
R.H.G.
railcards
random-effect
reentring
Rhizophora apiculata
ringing tone
rotation of circular polarized waves
screw-pine family
scurrit
Shiocton
sinoatrial conduction time
skinter
spv
statue books
subediting
swing pivot
Tabetshwe
tactile sensing array
The Party Claiming in General Average
Themeda trichiata
tropical desert zones
truckdriver
unconditioning
unilateral inheritance
unit power plant
unremunerated
US Fed Funds Target Rate
vegetative protection
visual connectedness
world association of law professors
wrathless