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
a D
acid asphalt
aminobenzoic acid
antiphase domain (apd)
aorn
articulus sellaris
astronomical transit
barium mixer
be a man
be through with
beresite
breeder end
bromo-hydrocinnamic acid
bureaucratic politician
carpet tacks
cell coordinate
chazellite
corneal endothelium
crabbings
cross-equation error correlation
cuffies
demand sth of sb
diey
donja visnjica
ELBW
electric dissociation
environut
evening tie
excursionary
flame-proof
fold over joint
foresped
fossler
garneting
giant rolls
gun-shaped forceps
gynecological endocrinology
halket
hand-ridden
HDC (high-speed data channel)
illuminations
in anger
injection molding cycle
invoice of indent
isodynamic magnetic separator
Kirivong
lacquer diluent
lawson's
load following
marysia
mast trunk
medial femoral circumflex veins
meridian sailing
middle sacral vein
millimeter of mercury
millimeter wave frequency
minimum range selection
mothering ability
mower section
mydriaticum
NAIRS
national metrological laboratory
nicotinamide ascorbate
Niphād
nomen undum
non-woven cloth
nonpenal
Odelouca
packed adsorption tower
pentagyna
plicae gubernatrix
plumbablest
pop-up books
power control lever
pseudoelement
radiopharmacist
Rayadrug
safety and arming device
sclerobase
shrank into himself
shuttle race slide
single-aperture lens
single-honours
spermiocalytrotheca
stakeboat
static accumulator oil
stem of epiglottis
stifle-bone
text links
text on nine keys
thermosensitive device
think something through
threshold friction
traction motor power supply system
turned comma
universal drill boom
virgin metal
vulgata
water resources control system
wayside clear
write lock-out
yoo-hoos