时间:2019-03-06 作者:英语课 分类:英语时差8,16


英语课

What’s A Good Insulator 1? How about air? Air is, in fact, a pretty good insulator, which is why styrofoam keeps things hot. It’s full of air. But even better than that would be a vacuum. Because there’s nothing in it to heat up, heat can’t conduct through it. A vacuum is the best insulator of all, and that’s the principle behind a thermos 2. A thermos is a flask 3 with a double-walled container inside it. Air is removed from the space in-between the walls. Now heat can’t escape from the soup; it’s surrounded by a vacuum. And to further help hold in heat the inside walls are silvered to reflect heat rays which try to escape.



n.隔离者;绝缘体
  • Few substances can equal fur as an insulator.作为绝缘体很少有其他材料能与动物皮毛相媲美。
  • A loose mulch acts on the surface as an insulator.疏松的覆盖物在土壤表面起了隔热的作用。
n.保湿瓶,热水瓶
  • Can I borrow your thermos?我可以借用你的暖水瓶吗?
  • It's handy to have the thermos here.暖瓶放在这儿好拿。
n.瓶,火药筒,砂箱
  • There is some deposit in the bottom of the flask.这只烧杯的底部有些沉淀物。
  • He took out a metal flask from a canvas bag.他从帆布包里拿出一个金属瓶子。
学英语单词
abrasive roll rice polishing macing
addicted
aleuronate
algolagnic
ammonolysis reaction
angiolymphatic
appreciation
atticsful
Bactrian camels
Bellis perennis
bill murray
bismutosmaltineb (bismutosmatite)
Bobandana
Carrowkeel
chasing behavior
chonglou
cock body
coded extension character
constitution day
coverage interest arbitrage
cowpea aphid
descriptive lexicology
diameter runout
direct current heating
double-platform
drinking water vendor
dynamic duty
elbow scissors
emergency forces
encaustics
environmental consequences
ethylene thiourea
fileout
flanchard
flux-cored welding
forfair
freescan
gallager codes
general subroutine
giggle stick
grandniece
gunroom
hematopathological
hemisystole
herringbone tooth (double helical tooth)
homosteroids
Hypocomatina
idle air bleed
ifa
intramedullary nail fixation instruments set
keep to themselves
kirpal
lamb's quarters
LeukotrieneE
Manol, R.
mercedesbenz
metalammonia
nayab
norm-enforcements
opium eater
outflew
paged memories
paracentesis cordis
Pareto law of income distribution
pineal bodies
pitter patter
pod dehiscence
postplenic
Punta del Este
push-button switch
quickopener
religionaries
remote gain amplifier
remote-control switching system
reother
rury
sector gear bearing
sex show
shaping property
sidhes
sisters-german
smelt up
sprayed-metal bonding
St-Rome-de-Cernon
star jellies
steel sheet edge folded
stick knocker
template milling
text angle
thiazepines
Tikhvinskiy Rayon
tootin
triplex chain block
uteroplacental
venture-backeds
versene-9
vertical centering alignment
walking out of mesh
water yield from snow
white-collar
wiping
yingjiangite (phosphurany)