时间:2019-03-06 作者:英语课 分类:英语时差8,16


英语课

 “Probably all, or nearly all, who have experienced a cold winter, are familiar with the cheery cry of the snow as it is pressed against a hard surface by the steel tire of a wagon 1, for instance, or even onto a pavement by the heels of one’s boots.” Those words were written many decades ago by the physicist 2 W.J. Humphreys in a book called Physics of the Air. Humphreys went on to suggest that creaking of snow is connected with very cold temperatures. Humphreys said that when the temperature is just below freezing and snow is easily packed into snowballs, footsteps and rolling wheels won’t create much sound. His reasoning is based on the fact that applying pressure to ice lowers its melting temperature. If ice is so warm that it’s about to melt anyway — say, at a temperature of 30 or 31 degrees Fahrenheit 3 — then a little pressure will be all that is necessary to melt it.



n.四轮马车,手推车,面包车;无盖运货列车
  • We have to fork the hay into the wagon.我们得把干草用叉子挑进马车里去。
  • The muddy road bemired the wagon.马车陷入了泥泞的道路。
n.物理学家,研究物理学的人
  • He is a physicist of the first rank.他是一流的物理学家。
  • The successful physicist never puts on airs.这位卓有成就的物理学家从不摆架子。
n./adj.华氏温度;华氏温度计(的)
  • He was asked for the boiling point of water in Fahrenheit.他被问到水的沸点是华氏多少度。
  • The thermometer reads 80 degrees Fahrenheit.寒暑表指出华氏80度。
学英语单词
acanthochiton
acception of persons
act according to
actvs
aetr
Akropong
ann c.
arteriae ulnaris
Asian cholera
atmosphere analyser
automatic monitoring
b-complex vitamins
barrow's
bill of lading copy
blow-run method
bricked it
brown smoke
chassepots
chewability
chirometer
civil time
clowers
Cogolin
consciousness-threshold
counterlaths
diameter ratio
differential block
doner kebabs
electronic journalism
ELEP (expansion-line end point)
employee business expenses
endomesoderm cell
euaugaptilus mixtus
factor of evaluation
finish gauge
fire extinguisher system
fordwine
globeflowers
GM_past-perfect-continuous-i-had-been-working
granoblastic texture
gross thickness
heavy-liddeds
horny-handed
hutzpah
hwyls
included angle
instantaneous frequency stability
insulating soft wire
isogermidine
Khārchok
land use mapping
lazy leucocyte syndrome
line of engagement
link (li)
Lithocarpus jenkinsii
lower end of duct
mediumfit
microscopics
microviscosity
mini-burgers
monotonic functional
morning draughtboard
nipponium
oligarchies
operatorship
Orissi
pharmacological compound
phosphatidylinositol(PI)
pole trawl
private listing
proton stream
psychorrhagia
qualified director
qualitative property
quartz watch
radio-thermoluminescence
Rhododendron jinxiuense
Sankt Gallenkirch
sarcinodes yeni
saturation patrols
scrap metals
shamshir
shyryf
specified point
Stewartia gemmata
sun-burned
super-huge turbogenerator
supply-demand relation
sylph-like
tandem milking parler
theos
thirled
trachy-pitchstone
two-way omnibus
unregimented
unvailing
valeryl phenetidine
washed down
whisenhunt
Wilkins Micawber
wintams
Zabud