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
active logging
alaglossa
apprehensions
audio-follow-video
axonal(axoplasmic)flow
balanced (frequency) converter
barn grasses
blimmings
came out with
cassette memory
Cephalonomia
chaotic feedback generator
chromyl chloride
Clara Barton
coal rock and gas outburst mine
contemporaneas
continuous-form card
cyclophosphamide
displacement blower
dissocial
dividing star
Do try more.
Duranol dyes
embryologic
epidemiology of cancer
examin
experimental establishment
falling short of
first-century
free-load
gas solubility factor
gas-tight machine
get a load on
group meeting
h-shaped
histological
hug the wind
hydro-structure
hyposulphate
ihsan
implementation controls
in an agony of joy
in-core thermionic reactor
institutor
islet tissue
Jueyin syndrome
kebabbing
kendal rank correlation
kilometric fault
leadout
limit switches
linux
locksman
make notes
makler
mariano arista
Maytenus emarginata
Mozambiquan
mylonites
nasal mutation
natural tolerance limits
nearside lay
Nephrocytium agardhianum
network connection point (of a wtgs)
neutralite
not a shadow of
off-path signal
one-man mine detector
order cancelled
parka hood
parmer
permissible clearance
placental hormone
play-dough
pre-Muslim
prechecked
prelusorily
price floor
private benefit
pv value
reining-in
rotating biological conductor
rubellin
Samuda
serves up
spaceborne system
stabitron
steering pitman
stormy petrel
straight grate
Supral
taeniola corporis callosi
thwarted ly
Trollius
tubular centrifugal fan
universal remote control
vaillant-couturier
wantcha
Wechelderzande
wet treatment
wholesomeness
wild blue yonder