时间:2018-12-11 作者:英语课 分类:万花筒2008年


英语课

Students rece cardboard boats at Lindenhurst high school


That this is one of the projects they're most excited about. They are reconstrained to working with certain materials, for example, cardboard. They can’t not use anything, they cannot use styrofoam, they can’t use duct tape and they can’t use regular wrapping tape. They have to use Archimedes' principle, calculate the buoyancy, make sure that the boat can actually float and what they have, er, what that is is, what that deals with is that the amount of weight that goes in the down direction must equal to the weight of the water that the boat is actually displacing.  


We didn’t seal up our boat enough and when I leaned back, the back collapsed 1, so we started taking on water and the whole thing sunk.  


The idea is to see whose boat lasts the longest and whose design holds up in the water without sinking.  


Yeah, we just want, when our boat races, boat's still good, the inside still dry, so we could go again tomorrow for, another round.  


WORDS IN THE NEWS     


1. cardboard : n-uncount 硬纸板、卡纸板


Cardboard is thick, stiff paper that is used, for example, to make boxes and models.  


2. styrofoam : n-uncount  泡沫塑料


Styrofoam is a very light, plastic substance, used especially to make containers. (AM; in BRIT, use polystyrene) 


3. Archimedes' principle: 阿基米德原理


The principle that the net fluid force on a body submerged (or floating) in a stationary 2 fluid is an upward force equal to the weight of the fluid displaced by the body. This concept, perhaps the oldest stated principle in fluid mechanics, was first put forth 3 by Archimedes in the third century B.C. 


4. buoyancy : n-uncount 浮力


Buoyancy is the ability that something has to float on a liquid or in the air.



1 collapsed
adj.倒塌的
  • Jack collapsed in agony on the floor. 杰克十分痛苦地瘫倒在地板上。
  • The roof collapsed under the weight of snow. 房顶在雪的重压下突然坍塌下来。
2 stationary
adj.固定的,静止不动的
  • A stationary object is easy to be aimed at.一个静止不动的物体是容易瞄准的。
  • Wait until the bus is stationary before you get off.你要等公共汽车停稳了再下车。
3 forth
adv.向前;向外,往外
  • The wind moved the trees gently back and forth.风吹得树轻轻地来回摇晃。
  • He gave forth a series of works in rapid succession.他很快连续发表了一系列的作品。
学英语单词
a jo
accelerating force
acetryptine
acute phaseserum
AMLS
arthritic cry
astroblast
auto-repeat
balanced ring modulator
bannatyne
be sb's poodle
bone-idle
brocentinol
butt log
canvalia lineata
capital returned to stock holders in dividends
care manager
Cholestagel
chromite brick
client server
combining-volume principle
complecting
computer integrated telephony
computer voice
contour ploughed corn field
cooper city
Denis-Leche's method
denticulate
dentine layer
double compression
double-dumped
elastic shinguard
electrical arc
electrogenic pump
enterohepatic cycle
eroded land
external cooling circuit
foam dust separator
Fourier interferometric spectrometer
frost-heaving soil
fuel injection pump speed
fuel oil transfer pump
glycopeptidase
ground food waste
heart peas
heat radiometer
Hebulina
Hemocaprol
high -speed gear
hussain
hypoxylon fendleri
impermeabilities
integral type detector
integrated digital analogue
intraoocyte
iron(ii) nitrate
knob insulator
lekson
livedoid
local efficiency
lupica
Mac-Amin
mafia states
mavroes
Mint Act
N-Methylisococlaurine
Noeleen
non-voluntary attention
officiality
one-plane method
open bridge
oropsylla
phillips gage
pile grating
plaque-forming units
plide
pressure-controlled plant
pro-palestinians
protected cutout
rebins
reservoir pore space
Rhodophiala
scuddings
shellfishing
snow swamp
sprayerflame
star-party
steamboatman
structure-sensitive properties
suture scissors titch scissors
Taubergrund
teach someone to do something
temporary removals
to get physical
Tonsillosan
toss it
UNDPKO
unilateral mastication
v. nasofrontalis
vanilli
versotrane
wide-field eyepiece