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
actynolin
agas
aglaonema costatum veitch
all-purpose machine
alpert ionization gauge
bankers' drafts
builder's risk policy
bullgrader
bur picking
business slump
byte oriented operand
central lobe
cleavage map
common bed
compellation
Conflenti
copocracy
Cristen
cyst-jejunum external drainage
damping derivative
Devalpalli
direct-memory access
during the month of October
euphotide
female line of breeding
fire breathing
footnoters
forced vibration cross-spectrum analysis
furcations
gas power station
Holmesfield
horn buoy
horribilities
housewarmings
hydrated ionic radius
in one's own right
intake charge
intramuscular anesthesia
itsier
keep one's head down
key l.
lake-water
langle
least mean square error
lesser palatine arteries
lijiangensis
low-frequency channel
low-powered microscope
macroelectrode
marakle
medium industry
millwheel
mitzna
multiple-object phase tracking and ranging
mutual coupling
Niablé
nodess of ranvier
nosocomial infections
offered firm
oiltight pitch
Oklan
Panjbarār
pargetting
pars phrenicogastrica (omenti minoris)
person-centred
playn
pokagon
present-life
pressure and velocity stage turbine
pterobryon subarbuscula longissima
punkzine
pyrochemical process
racial life cycle
rangaswamy
rattlin'
reprographically
San Guillermo, Parque Nacional
saurognathous
selacians
serine proteinase
sinistrorsely
spirilene
storing
subspiracular line
Suker's sign
swimmer's prurigo
switch pillar
tempo camodo
thallium(iii) chloride
to stand at attention
transfer function
tread-softly
trigonal scalenohedral class
Tuusniemi
Ucer
UGI gasifier
uncask
vinblastine
war grave
whole vision mask
xenon-iodine poisoning prediction