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
accept payment
actual mechanism
advancing contact angle
al balaim lagoon
albumn
alpha region
amygdaloid nucleus
and daddy was a fireman
angle blanking
anti-rolling tank
area defence
automatic volume compressor
before you could say Jack Robinson
biomechanistic
bloodspotting
boot leg
brass plated steel wire
broad-scaler
cabin fittings
channel grant high
Chartered Patent Agent
commerical harbor
computer sensitive language
coscinaraea columna
cuddie
dependable software
disranges
dittohead
dynamic sheet of fixed assets
Edward Lee Thorndike
embarcadere
epitrimerus parvispina
europeo
factious spirit
feeling of safety
fixed interval schedule
flange gasket
fraxinus velutinas
fruits
gavurin
glyoxide
gray magick
grid noise
haematoxylons
hand - to - hand combat
Hardinge conical mill
heavy oil rotary pump
hongkong
impact probe
interactive entry
Isodon oresbius
isotope
kellog
least-favourite
letching
long absent, soon forgotten
Mach band
matched-pair
matt varnish
mean sampling
mean width ratio
measuring the potential of hydrogen
modular language
MTR (materials testing reactor)
murdery
muscle in
noseprints
not get a word in edgeways
nucleofecting
optimal sustainable yield
optimized dispatching
ordinary day
organic heterojunction
ostery
paired disparity code
photoionised
play the idiot
poke fun
propane dewaxing process
ramollescene
register galley
remaining runway
responsivenesses
Ross,Harold Wallace
self cancelling
series of potential
service limits
setup fee
sink at sight
squaring valve
staggering stitch
starings
submittal
tearing strength by trapezoid method
terpilene
Teucrium viscidum Bl.
the stock market
traction boiler
underput
water aerated
win general acceptance
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