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
-mobile
alpha burst detector
amount of thrust augmentation
anisophyllous
b.ag.
ball anode
ball side positioning
beggest
bin cooling
bombesin
brodgars
Buganga
C alloy
Chāh Voshī-ye Janūbiī
CMDMS
compensating circuit
confined detonating fuze
conversion of coal
devil dancer
digitorum
dive straddle
domestic component
Dovadola
electroporators
enclosed boiling kier
entreated
expelling wind and removing damness
field declarator
film optical waveguide
fire coat
Flemingia stricta
frame synchronization code
friedlan
gardenii
genetically engineered cell
gnophomyia brevicellula
go over with a fine-toothed comb
graduated periodontal probe
gram force
hyaline test
Igorevskaya
in situ activation analysis
isolated thermodynamic system
Japan-like
Joseph I
kart-
Kolkino
laser distance measuring instrument
lautro
left face
mandore
maternine
Mato Verde
microq
Morley theorem
nonwelding
nucleonic transversal momentum
one-credit-hour
operational work
order disorder ferroelectrics
over-drinkings
parergons
point-contact semiconductor diode
polishing property
pollet
pool table
preliminary alignment
primary respiratory bronchioles
pseudo-program
pump diaphragm
radiation function
range animals
reradiating surface
researcher bias
resolders
rocket manufacturing technology
Sacedon
salt glands
seasonal adjustment
shadowood
signal interval
sinographs
slide valve gear
snobographer
son of Ham
squillionaires
Strongylida
switched major node
tax on income
thickness of dry film
to ensile
tooth gear
transistor NAND circuit
tripper conveyor
ungnement
union jacks
us lan
vesicular exanthema
Ward-Leonard control
wedding marches
whatever may betide
wrytings