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


英语课

   What Is Whipped Cream?


 
  It adorns 1 ice cream sundaes, pumpkin 2 pie, gingerbread, and hot chocolate. Its sweet creaminess tantalizes 3 taste buds and sends dieters running from the scale. Did you ever wonder why heavy cream whips into soft, light peaks? You can find out by listening today's moment of science!
 
  When you whip heavy cream, air is forced into the liquid, and a stable mass of bubbles forms. Each bubble is a tiny pocket of air encircled by a thin film of water with proteins and other substances dissolved in it.
 
  The protein molecules 4 that are caught in the bubbles are pushed and pulled by different forces, so they lose their normal shape. Once they lose their normal shape, the protein molecules bond together into a thin film, which stabilizes 6 the bubble walls.
 
  The proteins that stabilize 5 whipped cream are the same as milk proteins, so it would seem that milk would whip into soft shiny peaks as well. But you could whip a bowl of milk all day and never get anything more than a light froth that would disappear almost immediately.
 
  The difference lies in whipping cream’s high fat content. Whipping cream is from thirty to forty percent fat, in contrast to the four percent fat found in whole milk.
 
  The fat molecules in cream form a strong, stable network that keeps the bubble walls from collapsing 7. Small spheres of fat molecules gather together in the bubble walls, where surface forces break open the sphere. The exposed fat molecules stick to each other, and the network forms.
 
  The fat molecules in milk act similarly, but there aren’t enough of them to stabilize the milk foam 8 for more than a few seconds.

装饰,佩带( adorn的第三人称单数 )
  • Have adornment, the building adorns the product of material. 有装饰,就有建筑装饰材料的制品。
  • In this case, WALL-E adorns every pillar. 在这段时间,Wall-E占据了各个显要位置。
n.南瓜
  • They ate turkey and pumpkin pie.他们吃了火鸡和南瓜馅饼。
  • It looks like there is a person looking out of the pumpkin!看起来就像南瓜里有人在看着你!
v.逗弄,引诱,折磨( tantalize的第三人称单数 )
分子( molecule的名词复数 )
  • The structure of molecules can be seen under an electron microscope. 分子的结构可在电子显微镜下观察到。
  • Inside the reactor the large molecules are cracked into smaller molecules. 在反应堆里,大分子裂变为小分子。
vt.(使)稳定,使稳固,使稳定平衡;vi.稳定
  • They are eager to stabilize currencies.他们急于稳定货币。
  • His blood pressure tended to stabilize.他的血压趋向稳定。
n.(使)稳定, (使)稳固( stabilize的名词复数 )v.(使)稳定, (使)稳固( stabilize的第三人称单数 )
  • The broadbased attachment of the mesenteric root stabilizes the small bowel. 肠系膜根部基底宽阔的附着面使小肠得以稳定。 来自辞典例句
  • The available supply of industrial product and produce stabilizes growth. 工业品与农产品的有效供给稳定增长。 来自互联网
压扁[平],毁坏,断裂
  • Rescuers used props to stop the roof of the tunnel collapsing. 救援人员用支柱防止隧道顶塌陷。
  • The rocks were folded by collapsing into the center of the trough. 岩石由于坍陷进入凹槽的中心而发生褶皱。
v./n.泡沫,起泡沫
  • The glass of beer was mostly foam.这杯啤酒大部分是泡沫。
  • The surface of the water is full of foam.水面都是泡沫。
学英语单词
ACU (add control unit)
apoptotics
application image
asynchronous response mode
bencher
Bronnitsy
calycanthus families
carry too many guns for someone
CCAU
centring diphthong
club-room
coal sizes
comoc (computer mockup)
compound boundary
convergence of fourier transform
coupling release handle
cykes
differential discriminator
doll up
downmix
drainage grommet
drop model (of nucleus)
e-edition
easy-care sheep
egg-shaped
elegiographer
emptinesses
empty pages
endonucleolus
endurement
ethmoidal cellules
exclusion operation
facial nerve
finite boundary element method
flin
free energy criterion
fundamental strength
glass-enclosed building
grayishest
gust frequency
isotypic specificity
keep it
kitty witties
Kocher's incision
lecomte
livingood
message format service
Mitsubishi Group
mix your metaphors
moisture control
mole drain
multiple views
murl
nepal trumpet flowers
non-precision-instrument runway
offencious
painter and decorator
planodia
plywood fuselage
post-ictal
powerlifting
pre-Keynesian theory
Primula comata
principle of dimensional homogeneity
probangs
proscillaridin
quadfurcation
Queer as Folk
read screen
refulgently
rehimena phrynealis
relieved cutter
Rhamnus nakaharae
Sankt Anton
Ship's Trading Certificates
Shop Spring
Sinologer
spegazzinia sundara
sphere of knowledge
spilogale putoriuss
spotted cowbanes
stigmatic papilla
sublimation risks
Tangshen
tetrofosmin
the stream of time
toolmaker microscope
trade profit and loss account
triactinal
triazidoacetic acid
unclap
unhexed
unios
Vaiges
Vavoua, Dép.de
vittandly
Ward Hill
Weonhang
wood figure
worked towards
zero-incidence