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depressing the valve.
deflect deflect /d|flekt/ verb 1. to cause an
object to move away from a neutral or
central position
During an out-of-balance
turn, the ball in the slip indicator
will be deflected to the left or right. 2. to
move a moving object, gas or liquid
away from its intended path
In an
open-cockpit aircraft, the windshield
deflects the airflow over the pilot’s
head.
deflection deflection /d|flekʃ(ə)n/ noun 1.
movement away from a central or neutral
position
Full deflection of the
ailerons is sometimes needed on takeoff
to counteract a crosswind. 2. the
movement of a moving object, gas or
liquid away from its intended path
In
the southern hemisphere the deflection
of wind at the equator is to the left.
deformation deformation /difɔ|meʃ(ə)n/
noun a change of the correct shape
caused by stress
Deformation of wing
panels may be an indication of serious
structural damage.
deg deg abbreviation degree
degradation degradation /de$rə|deʃ(ə)n/ noun
a decrease in quality
Degradation of
the radio signal sometimes makes it
impossible to understand the message.
degrade degrade /d|$red/ verb to decrease
the quality of something
Interfering
signals degrade VOR performance.
degree degree /d|$ri/ noun 1. a level,
amount or quantity  the degree of
compression the amount of compression
 a high degree of safety a high
level of safety  to a greater degree
more than  to a lesser degree less than
2. a unit of temperature
twenty
degrees Celsius (20°C)
twenty
degrees Centigrade (20°C)
seventy
67 density altitude
degrees Fahrenheit (70°F) 3. a unit of
measurement of an angle equal to
1/360th of a circle – each degree is
divided into 60 minutes and each minutes
into 60 seconds
Make a turn to
the right at a bank angle of 30°.  an
angle of 90° a right angle 4. a unit of
direction as measured on a compass

east = 090°
west = 270°
degrees true degrees true /d|$riz tru/ noun
degrees of direction measured from true
north, not magnetic north. Also called
true degrees. Symbol °T
dehydration dehydration /diha|dreʃ(ə)n/
noun an unwanted and sometimes dangerous
loss of water from the body

Dehydration can be avoided by drinking
plenty of water.
de-ice de-ice /di as/ verb to remove ice

The ground crew de-iced the aircraft
prior to take-off.
de-icer de-icer /di asə/ noun a device or
substance used to remove ice
De-icer
spray should be checked to make sure it
is not harmful to light aircraft windscreens.
de-icing de-icing /di asŋ/ noun the
removal of ice  adjective referring to
the removal of ice
de-icing fluid

anti-icing, icing
delay delay /d|le/ noun a period after the
expected time that you have to wait
before something happens, the length of
time by which something is late
By
day, the presence of cloud can cause a
delay in clearance of fog.  verb 1. to
make late, to cause to be late
Take-off
was delayed because of fog. 2. to put
something off until later
He delayed
telling her the news until they had
landed.
delayed-action delayed-action /d|led kʃən/
adjective in which there is an unusual
passing of time between stimulus and
response
The door is fitted with a
delayed-action lock which operates one
minute after the power has been
switched off.
deliver deliver /d|lvə/ verb to provide, to
give
The motor will continue to run
but will deliver only one-third the rated
power.
The pump can deliver fuel at
the rate of 2,000 gph.
delivery delivery /d|lv(ə)ri/ noun the act of
providing or giving
On some pumps, a
depressurising valve is used to block
delivery to the system.
delivery pressure delivery pressure /d|lv(ə)ri
preʃə/ noun the pressure normally
expected when fuel is being pumped
deluge deluge /deljud"/ noun  fire deluge
system
demand demand /d|mɑnd/ noun 1. a need or
use caused by necessity  high current
demand on a generator a situation
requiring the generator to produce a lot
of electricity 2. a request which is made
firmly  on demand when asked for or
ordered
A computer will produce, on
　
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本文鏈接地址：Dictionary of Aviation上(63)