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
-bearing
-derm(a)
A.T.C.
abstract juristic act
acetylornithine cycle
aggregate savings
Alagille syndrome
antarctic surface water (aasw)
attitude knowledge skill pattern
avoidance reaction test
beam-power amplifier
beli manastir
bib cock
bicycle undercarriage
big-head
bismuth amalgam
blasting gelatin(e)
breathing fire
case (pathological) book
Chavannes, Puvis de
clean ballast
colo(u)red varnish
common canal
concordant tendon
condensate trap
continuous survey of the hull
corporal quadrigemina
cost-benefit analyses
cycle sequencing
Dacice
elastic plan
electric vibrating feeders
elution program
emergency goods
energetic optimum
estimated annual expenditures
external excitation circuit
film forming compound
fine art repository
fixed income securities
formycin B
freight label
freudianism
glacier lilies
gonderia mutans
imaginal exposure
insulated gate bipolar transistor (igbt)
item on the agenda
jitterbug (usa)
kebbucks
Kuteynikovskaya
lap coverings
Lee, Loch
lighthandedly
link popularity checker
Luing
lunar volcanism
lxxxier
Memphis
mgco
mike nichols
moisturizing creams
mozambikite
mr clean
musion
nanospring
nilpotent algebraic group
out-dream
output edit
overload series transformator
oyabun
postsurvey adjustment
potato bread
prefixial
pressure frame
purging arrangement
Qusar
race against
radio magnetic indicator
red lead powder
register-renaming
resistance sensitivity
rhizopus nodosus mamyslowski
second constituent
single-pole three throw switch
spot meter
spring for
subterranean line
tendancy
term of settlement
tethyum
thermal endurance profile
thoria gelatination
thrust vectoring
today's
urocystis triticis
vacuum-tight gasket
ventilation fence
vertical tower launcher
warp pile fabric
wax master