时间:2018-12-27 作者:英语课 分类:英语时差8,16


英语课

 If you've been outside before a rainfall in the spring, you might have noticed a particularly fresh or sweet smell that seeps 1 into the air a few minutes before the first drops begin to fall. If you're familiar with this smell, it's a great way to predict when the rain is about to start. What, exactly, makes the air smell like rain? A lot of stories and folk tales have arisen to explain this odor. Long ago, people used to believe that rain clouds picked up sweet smells from Heaven, and the rain carried these angelic odors to Earth. A more up-to-date–but equally incorrect–version of this folktale is that the smell comes from ozone 2, carried from the upper atmosphere by the falling rain. In fact, that fresh smell isn't coming down from the sky at all. It's coming up, from the ground beneath your feet. As a spring rain approaches, the humidity level at the ground tends to increase. Moist air is much better than dry air at transmitting smells–this is why you might use warm, steaming water to carry the smell from dried potpourri 3 into the air of your house. As the humidity rises, the moist air carries the fresh smell of oils, secreted 4 by grass and other ground plants, up to your nose. It also carries the odors of ground dwelling 5 bacteria and fungi 6. These smells are always in the air immediately above the ground, as you can test for yourself by sticking your nose into your lawn and breathing deeply. When a rainstorm approaches and the humidity climbs, the odor rises up from its earthly embrace and you say–it smells like rain!



1 seeps
n.(液体)渗( seep的名词复数 );渗透;渗出;漏出v.(液体)渗( seep的第三人称单数 );渗透;渗出;漏出
  • Water seeps through sand. 水渗入沙中。 来自《现代汉英综合大词典》
  • Water seeps out of the wall. 水从墙里沁出。 来自《现代汉英综合大词典》
2 ozone
n.臭氧,新鲜空气
  • The ozone layer is a protective layer around the planet Earth.臭氧层是地球的保护层。
  • The capacity of ozone can adjust according of requirement.臭氧的产量可根据需要或调节。
3 potpourri
n.混合之事物;百花香
  • As tobacco cigarette burns,a potpourri of 4000 chemicals is released,including carbon monoxide and hydrocyanic acid.当烟被点燃时,融合了四千种化学品的气体被释放出来,其中包括一氧化碳和氢氰酸。
  • Even so,there is a slight odour of potpourri emanating from Longfellow.纵然如此,也还是可以闻到来自朗费罗的一种轻微的杂烩的味道。
4 secreted
v.(尤指动物或植物器官)分泌( secrete的过去式和过去分词 );隐匿,隐藏
  • Insulin is secreted by the pancreas. 胰岛素是胰腺分泌的。
  • He secreted his winnings in a drawer. 他把赢来的钱藏在抽届里。 来自《简明英汉词典》
5 dwelling
n.住宅,住所,寓所
  • Those two men are dwelling with us.那两个人跟我们住在一起。
  • He occupies a three-story dwelling place on the Park Street.他在派克街上有一幢3层楼的寓所。
6 fungi
n.真菌,霉菌
  • Students practice to apply the study of genetics to multicellular plants and fungi.学生们练习把基因学应用到多细胞植物和真菌中。
  • The lawn was covered with fungi.草地上到处都是蘑菇。
学英语单词
Aciculella
acute infectious purpura
Adenosma glutinosum
ancillary system
angiography of celiacartery
appendiceal adenocarcinoma
atheromatosis
BFPT
biased electrode
blow end point
brannockite
capacity of husker
cloud feature
cohesiveness through identification
COMAC
communication database cdb)
compassly
conventional interest rate
cost slope
dark yellow
dead weight scale
decimal marker
dietary antigen
dissecting aneurysm of aorta
Dominicus
effective gamma-ray activity
einstein tower
exaltedly
external economy
extraction ratio
f.i.t.
F.O.R., f.o.r.
fiorentino
fixed-point
general public
girth gear
guanabenz
height of incidence
high-energy resonance
hydraulic liquid
impregnation deposit
impurity gettering
incapacity pension
infiltratively
integration model
Japanese Port and Harbour Association
juise
lewis hole
low temperature coefficient re-gulator
marital statuss
McCulloch-Pitts model
microtapes
milacids
molecular theory of solution
moralist
mucoid colony
multicopy time-sharing system
night tremors
no bargain
no-strikest
normal credit tranche
notres
orbit number
pent-house apartment
permanent shading
pfenig
phospholamban
picturehatted
place-kicker
plantar cushion
polyglot
polyhalite
powder spraying
pre-lease
propagating system
proper symbol
protibial
quick-firer
rear wall skeleton
reshampooing
rose sandal amber
salivary stylet
sanitary regulations
science-a process approach (sapa)
set ... to
Siberian crabapple
sodium-ethylenediamine-tetra-acetic acid
specialized analysis
steam head
Streptococcus zymogenes
swinging hatchcover
switch cubicle
synoptistic
take place in
teacher-leds
upsales
us paper money
van eycks
Weser
wetmore
wittke
work surface