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
acenaphthenes
Agats
ammonchelidonic acid
apoaequorin
bacmicetin
bipolar cell
brevi manu
broadcast sowing machine
built-in motor drive
butter (parchment) paper
chirurgie
citizen governance
cluster water
coefficient of moisture permeability
colloid meal
counterbalancing
Cpes
current measuring instrument
dagans
dashing leather
de-Sunnified
dendrolites
DHL courier service
educology
empty receptacle
equal pay for equal work?
eskimo cloth
excess issue
exodetrinite
fluorescence-activated cell sorter
fortunato
gain recovery
germanischer lloyd (gl)
gross production efficiency
Hardeeville
harmane
huntingtins
ideal realism
immunomodulator
insulation oil
LFAB
look-up routine
manhigh balloon flight
metempsychosis
micro disk transistor
mikhail bakunins
Monbahus
moritz den
Mysovka
nappekyn
narrow hook rule
neutropoietin
Note-row
nutribility
olenick
orthoptoscope
peltas
perceived control
philostephanus ovalis
picture specification table
pokeweed families
Porteus maze tests
pouchitis
pressure defined chamber
pto lever
research value
residence routine
retarded menstruation due to deficiency of blood
retirement-savings
ring unit
runy
scattering absorption
school-linked services
scopornetry
selectwomen
Sinapis juncea L.
speck dyeing
split ring clutch
standard counting error
standheight diameter
stimulte
Taklimakan Desert
tallying
Tambovka
taper of web diameter
the Midland
thorium resources
tithely
transmission tie-points
triacanthodids
TV mannequin
two way radio communication
tyre crane
unsatisfied chemical bond
valises
VHTR (very high temperature gas cooled reactor)
waist high
water-stop
wet leaves
wifty-wafty
Xuan-tong
year-end audit