时间:2019-01-22 作者:英语课 分类:英语时差8,16


英语课
Humans have used many devices 2 to measure time. The sundial was one of the earliest and simplest. A sundial measures the movement of the sun across the sky each day. It has a stick or other object that rises above a flat surface. The stick, blocking sunlight, creates a shadow. As the sun moves, so does the shadow of the stick across the flat surface. Marks on the surface show the passing of hours, and perhaps, minutes. The sundial works 3 well only when the sun is shining. So, other ways were invented to measure the passing of time. One device 1 is the hourglass.The hourglass is shaped like the number eight --- wide at the top and bottom, but very thin in the middle. In a true "hour" glass, it takes exactly one hour for all the sand to drop from the top to the bottom through a very small opening in the middle. When the hourglass is turned with the upside down, it begins to mark the passing of another hour. By the eighteenth century, people had developed mechanical 4 clocks and watches. And today, many of our clocks and watches are electronic.
 

n.器械,装置;计划,策略,诡计
  • The device will be in production by the end of the year.该装置将于年底投入生产。
  • The device will save much time and effort for us.这种装置会使我们节省大量时间和气力。
n.设备;装置( device的名词复数 );花招;(为实现某种目的的)计划;手段
  • electrical labour-saving devices around the home 节省劳力的各种家用电器
  • modern labour-saving devices such as washing machines and dishwashers 诸如洗衣机和洗碗机之类的现代化省力设备
n.作品,著作;工厂,活动部件,机件
  • We expect writers to produce more and better works.我们期望作家们写出更多更好的作品。
  • The novel is regarded as one of the classic works.这篇小说被公认为是最优秀的作品之一。
adj.机械(学)的;力学的;机械似的;手工操作的
  • He borrowed a mechanical book from me.他从我这儿借了一本力学方面的书。
  • He looks very mechanical.他看上去非常呆板。
学英语单词
aft-cabin
after-dripping
airconditioned
alternate segregation
automatic equalization
basio-
birdskin
bleeding-edge
bravais law
Breuches
broom rape
carpindolol
carrion beetle
catalyst layer
centi
cerebral tumor
circumferential rib
cost of renovation
Dalysep
desynonymizations
difference of arcing time
distant repeater
donkeyback
downslope
eccentric increaser
eeigs
electronic contactor
elliptic integral of the first kind
equation of state for tension
equine virus rhinopneumonitis
exert every effort
financial supports
flavonoids
foreign patent
friction circle analysis
glycylcyclin
go the bundle on
gravid emphysema
hakan
Hanover County
head-coaching
heteromorphic multinucleate
high frequency testing apparatus
higher dimentional space
honorableness
house-break
hypobasidiums
i-athele
INTCON
interchromosomal
invarable effect
karpathite
Koranyi's method
kuehn
Laogong (P8)
Laverack
LCDC
log out
machosexual
mass work
maungy
nmed
omentocele
overprotecting
packhorse bridges
Paruro
phallic shield
platen press
prashant
prevention action
public transport junction
put one's hand to the plough
quadripaschal
quick response exciter
rabbit-eared bandicoot
rise of blocks
rodkin
satellite industry
saucerman
seesters
set-in bridge
sev
slow axis
Soft words butter no parsnips.
sound effects library
space division switching system
spherular
standard meridian
swimmeret
synovitic
Tarullo
Thermoproteaceae
thoracic nerves (or dorsal spinal nerves)
triethyleneglycol
ulnar border
unknowns
ust-olen?k
Weber's operation
wedding picture
weepiness
working parameter
yoof