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
a trip down memory lane
aerial telescope
africa-american
after - tax profit margin
after tomorrow
ankle-strap
Arkabutla L.
Asfahak
atmospheric changes
atomic set function
average element time
barminess
base-metal attack
berolase
boiling heat transfer coefficient
by line
by number
casing collapsed
change in sequence
charmedly
chelifore
child-baseds
cluke
cold - water flat
corneal layer
Currier and Ives
cymogenes
Deelfontein
demszky
dichogaster affinis
dispersive flow
e-
electron beam energy
embedability
endoneurolysis
equivalent static acceleration
euphranta (rhacochlaena) jucunda
excess of water
fabianism
first generation evaluation
fissidens anomalus
foot-hills
gaddock liver oil
glomus versiforme
Grounding Resistors
hand boom
heidenhain's cell
hemihyperatrophy
i-wasted
ignifluid boiler
inadvisability
KDB Asia Limited
lightning war
macock
main en squelette
mariehamns
mask production
monochloro triazine dye
mosko
moving ball type viscometer
navigation system using time and ranging
news articles
nodular-fireclay
nonpredatory
notched-bar impact test
open design
ordinary property tax
orinasal phones
phallogocentrism
physical causes
plaster core
plus-points
pre-competition
psychometer
pycnidia
radioelectrocardiography
redevelopment plan
refuelling scheme
resistance-bridge pressure pickup
retial
ruboxistaurin
Sarymsakty
schtetl
Sinhung-ni
sintered-aluminum product
snoek peak
soldered side seam
solid state injection laser
storage box
Streptomycetaceae
stump oratory
superconduction phenomenon
takes liberties
tantallum ore
technical research report
timing phase
turbo-distributor
uncoform
valve remote emergency shut-off mechanism
welch plug
Western Dvina
zone heat