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
abstract factory pattern
achroocytosis
avolate
Balkan Oblast
be caught in a cleft stick
be indifferent to
beam-foil technique
cadmium screen
cannot-link
capacity constraint vector
car type conveyor
chart-based
chrematophobia
circuit representation
classification of costs by function
cmsr
composite bulkhead
conflabs
control character printout
correlatives
crewels
cross-inlet water turbine(cross turbine)
database builder
design guideline
Dongué
eighteen-minute
electronic annunciator
eurycephalic
eyecream
factorage
false goatsbeards
festgoers
front-rower
full depth pear
gay-friendly
go, man go
hanged on
hard copy file
hypophosphatasaemia
incredited
increment of hour angle
International Standard Book Number
it's Greek to me
john-paul
karl adolf eichmanns
Kālinjara
lastes
lewy
linear potential
longitudinal profile
Makamba, Prov.de
Mark Rothko
marketing value
Maňeru
mittes
moderating effect
molten-salt container
monetary economics
murcer
Nizhneilimsk
on the loaf
ordinary telegrah communication
oscillating sieve
P'angyo
paired selected ternary
paratrichius vittatus
peske
phacellate
plate-handling crane
plexus ophthalmicus
plumba
poynting polarimeter
precast concrete block flue
pressed stem
quadripartites
radiation luminescence
real-time scanner
rhamphoid
right-eyed flounder
Rockland Res.
run untrue
sand disc
Schraplau
sector-focused cyclotron
selenetaen
shore pit viper
shortall
simians
slope grader
Stapelfeld
steer committee
step servomotor
stereo-regularity
striving for superiority
supporting plate
swivel wheel head
tab welder
ultrasonocardiotomogram
unboundable
Viola acutifolia
where one is coming from
Zboriv