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or digital form.
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altitude altitude /lttjud/ noun the vertical
distance between an aircraft, or a point
or a level, and mean sea-level  to lose
altitude to descend from higher to
lower altitude  cabin altitude the artificial
altitude created in the cabin by
pressurisation
alto- alto- /ltəυ/ prefix at a moderate or
high altitude
altocumulus altocumulus /ltəυ|kjumjυləs/
noun small white cumulus clouds
which form as a layer at moderate altitude,
usually meaning fair weather.
Compare stratocumulus
altostratus altostratus /ltəυ|strɑtəs/ noun a
uniform layer cloud at moderate altitude
aluminium aluminium /lə|mniəm/ noun a
strong, light metal used in the construction
of aircraft (NOTE: The US English is
aluminum.)
COMMENT: In recent years, aluminium
has been increasingly replaced by the
use of composite materials in the
construction of different types of
aircraft, from small home-built light
aircraft to transport aircraft such as the
Airbus A320.
aluminum aluminum /ə|lumnəm/ noun US
same as aluminium
AMA AMA abbreviation approach monitoring
aid
amber amber /mbə/ adjective an orange or
yellow colour
An amber light flashes
on the instrument panel. (NOTE: Amber
17 analogue
is often used to describe the colour of
the yellow light in traffic signals.)
ambient ambient /mbiənt/ adjective referring
to the surrounding atmospheric
conditions
Fresh ambient air is routed
into the cabin.  ambient temperature
the temperature outside the aircraft
ambient pressure ambient pressure /mbiənt
preʃə/ noun the pressure outside the
aircraft
ambiguity ambiguity /mb|$juti/ noun
something heard or seen which can be
understood in more than one way, thus
resulting in possible confusion  to
avoid ambiguity to avoid misunderstanding
or confusion
Correct use of
R/T phraseology avoids ambiguity.
ambiguous ambiguous /m|b$juəs/ adjective
able to be understood in more than one
way
It is important that R/T transmissions
are not ambiguous.
AMD AMD abbreviation amendment
amend amend /ə|mend/ verb to change,
update, improve or correct something 
he amended the entry in his log book
he corrected or changed the entry in his
log book
amendment amendment /ə|mendmənt/ noun a
change, updating, improvement or correction
made, e.g., to a document or
procedure
When a terminal aerodrome
forecast requires amendment,
the amended forecast is indicated by
inserting AMD after TAF.
ammeter ammeter /mitə/ noun an instrument
for measuring amperes in order to
give the strength of an electric current

The centre-zero ammeter tells the pilot
the status of the aircraft battery.
amp amp /mp/ abbreviation ampere
amperage amperage /mpərd"/ noun the
strength of an electric current expressed
in amperes
Measuring the amperage
of a motor can give a rough estimate of
the load on the motor.
ampere ampere /mpeə/ noun a unit of electric
current equal to one volt flowing
through an impedance of one ohm
a
13-amp fuse
Current flow is measured
in amperes. Abbreviation amp 
ampere hours number of amperes per
hour
Battery capacity is rated in
ampere hours.
ample ample /mpəl/ adjective plenty of

During the course you will have ample
opportunity to demonstrate your skill. 
ample time plenty of time
amplification amplification /mplf|keʃ(ə)n/
noun the act of increasing the strength
of an electrical signal
Amplification of
the signal increases the volume.
amplifier amplifier /mplfaə/ noun an electronic
device for increasing the strength
of an electrical signal
If the power
supply from the amplifier to the gauge
fails, the needle slowly falls to zero.
amplify amplify /mplfa/ verb to increase
the strength of an electrical signal
An
electric current is amplified and then
transmitted. (NOTE: amplifies – amplifying
– amplified)
amplitude amplitude /mpltjud/ noun the
maximum variation of a vibration or
oscillation from the position of equilibrium

to calculate fuel required, multiply
the duration of the flight by the consumption
of the engine at the required
power
　
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本文鏈接地址：Dictionary of Aviation上(17)