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
adjustable ratio autotransformer
aduertiser
alimentary canal (or digestive tract)
amblychromatic
Ardil
argonin
arteria epigastricas
attack of insects
bat five hundred
bed-side
by-pass monochrome image
cal(l)iper
cervico-axial
chat-rooms
chopper control
columbus days
common comfreys
consumption network internal
cursor register
cyclonically
dendrodoris tuberculosa
discharging machine
discriminately
double linkage brake mechanism
eccentric hypertropy
economic health
Edward Durell Stone
electric wiring
energetic emission
Entemnotrochus
erres
Euler digraph
extension of homeomorphisms
family house
forced wind circulation
fuckmeat
furnace tool
geothermal water corrosion
hacksaw frame with plastic handle solid type
hear something from somebody
high purity cadmium
hofen
IFFT
kilo-volt-meter
kinemometering radar
magistratures
magnetic-deflection sensitive
maritime communication satellite
misbehavings
mishu
monsterlet
multiline telephone
multisized
n-acetyl-hydroxylamine
naturals
neurotransmitted
nonlinear elementary excitation
nonopinionated
oil dilution
on one's heels
overclockable
oxygen measurement set
papademetriou
paralbuminemia
paramagnetic mineral
pitch pipe
podzolized meadow soil
poorwill
quasimodular
rachitis foetalis micromelica
Rambouillet
recensors
resistance grounded
shipping cask
shocketh
shoot one's linen
silverdocs
simplex strainer
sinogracilis
Smilax nana
sneak
soils with a high alkali content
street plan
strongarmed
taken effect
teleheating
the full money
thermionically
time-sharing executive operation
tokutaro
tough steel
treherne
trillos
typical cases in observation
umbelled
unit fuel injection pump
urled
VMware ThinApp
warm fronts
way-back
Yakovleva
Yazgulyam