时间:2018-12-31 作者:英语课 分类:英语听力文摘 English Digest


英语课

   It may sound silly, but it’s really a good question, because weightlessness does make a visit to the latrine a tricky 1 proposition.


 
  Weightlessness poses two main problems in the bathroom. The first is that an astronaut could drift away from the bowl at any time. But, there is a simple solution. They put on thigh 2 and foot restraints in order to go to the john!
 
  The second dilemma 3 is a bit more complicated. Here on earth, gravity assures that our waste falls downward, away from the body. But, under weightless conditions, body waste has the disconcerting tendency to hover 4 close to wherever it exited the body. On the earliest space flights, astronauts had to tape a bag to their bodies to catch the waste, but that got pretty messy, so don't try it at home.
 
  Today, astronauts actually use flushing toilets, but the toilets flush with air, instead of water. First, the air flow draws the waste away from the body, then flushes it into storage tanks. All of the liquid waste from the spacecraft is stored together in a holding tank, which is periodically dumped overboard, where the liquid evaporates.
 
  Solid waste, on the other hand, goes into a container that’s exposed to the vacuum of space. The vacuum completely dries out the solid waste, which is taken back to earth for disposal.

adj.狡猾的,奸诈的;(工作等)棘手的,微妙的
  • I'm in a rather tricky position.Can you help me out?我的处境很棘手,你能帮我吗?
  • He avoided this tricky question and talked in generalities.他回避了这个非常微妙的问题,只做了个笼统的表述。
n.大腿;股骨
  • He is suffering from a strained thigh muscle.他的大腿肌肉拉伤了,疼得很。
  • The thigh bone is connected to the hip bone.股骨连着髋骨。
n.困境,进退两难的局面
  • I am on the horns of a dilemma about the matter.这件事使我进退两难。
  • He was thrown into a dilemma.他陷入困境。
vi.翱翔,盘旋;徘徊;彷徨,犹豫
  • You don't hover round the table.你不要围着桌子走来走去。
  • A plane is hover on our house.有一架飞机在我们的房子上盘旋。
学英语单词
acate pneumonic tuberculosis
air tanker
Allen key
amynologic
AOEL
AORTF
aperture-field method
Bactris
benzene hexachloride (bhc)
cage structure
camcorders
caraca
carved wooden necklace
ccr(current cell rate)
centerbody
charge turbulent fluctuation
circle shear
circular shelf dryer
closed cycle
coefficient of self oscillation
conjugate locus
conservations of mass
corrosion resisting property
cost utility analysis
cross-adaptation
crumpacker
cryogenic heat pipe
crystalliser
diacetyl-dihydroxydiphenylisatin
dimethyl tartrate
double punch and blank-column detection
dower and courtesy interests
Duhring's diagram
enteric bacillus
epistatic gene
EPO-R
family Lobotidae
Fleet vehicle
fuze firing mechanism
gets along
graduated hopper-charging
gynaeco-
Hall flowmeter
hindshanks
honey glands
Johnny on the spot
lehmannite
listenest
literary critics
make one's escape
marieclaude
mechanization of maintenance
miniatus
molecular absorption band
mounting metallurgical specimens
musculus extensor digitorum longus pedis
network-connected
neutral phosphate
NIH-7519
orates
paddle type agitator
papillary foramen
paris-journal
Phyllomahaleb
pitching change
platform barrier
POPSIPT
Porlezzina
propeller-regulating mechanism
pulpiform
rassling
recovery flap
remerging
resistance-weld mill
rock bolting jumbo
S.S.P.
spheriflex hub
spring gage
stopine
sturrocks
subdetector
superpredicate
switching line
tail throat of a hump yard
teeming stage
tetralogies of fallot
the Met
The sands are running out.
theater air priority number
Themar
tie-in line
tin plate printing
tinamidaes
trachodonts
transfer target
turning block
turpentine wood oil
universal cutter and tool grinder
weather search radar
zahava
Zarp