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of factors such as aircraft damage, passenger-
load, fire, etc., will affect the
decision on whether to evacuate the
aeroplane or not.
assign assign /ə|san/ verb to set apart
beforehand or allocate for a specific
purpose  assigned seats seats selected
beforehand for particular people
Crew
sit in their assigned seats.
Individual
carriers assign codes to aircraft.
assist assist /ə|sst/ verb to help
If you
have any difficulty, cabin staff will
assist you.
When evacuating the aircraft,
hand signals by cabin staff assist
in directing passengers to the exits.

power
assistance assistance /ə|sst(ə)ns/ noun help 
to require assistance to need help
If
a pilot requires assistance, they should
contact ATC.  to provide assistance to
give help
associate associate /ə|səυsiet/ verb to come
with or be linked to something else

Turbulence is often associated with
strong winds.
The airport authority
has to overcome a lot of problems associated
with its plans to build a new terminal.
association association /ə|səυsi|eʃ(ə)n/ noun
1. a group of people who organise
themselves into an official body with
common objectives and a code of conduct

British Air Line Pilots Association.
2.  in association with together
with
Rain-ice occurs only rarely over
the British Isles and is usually found in
association with warm fronts.
assume assume /ə|sjum/ verb 1. to take as
true before there is proof
I assume
that she’s ill because she’s not at work
today – but I may be wrong. 2. to suppose
 for our studies we will assume
that the earth is a perfect sphere we
know that the Earth is not a perfect
sphere but it helps if we accept, for the
time being, that it is  assuming (that)
accepting or supposing that
Assuming
that the return flight from the point of no
return to A is made on three engines,
calculate the distance from D to the
point of no return. 3. to take on, to
undertake the duties of somebody
The
copilot assumed control of the aircraft
after the captain was taken ill during
the flight. 4. to take a particular bodily
position
The correct technique of
using the escape slides is to assume a
sitting position.
assumption assumption /ə|smpʃ(ə)n/ noun an
understanding or belief
The one-insixty
rule is based on the assumption
that one nautical mile subtends an
angle of one (at a distance of 60 nautical
miles).
asymmetric asymmetric /s|metrk/, asymmetrical
/s|metrk(ə)l/ adjective
not identical or equal on each side of an
imaginary central dividing line. Opposite
symmetric
asymmetric flight asymmetric flight /smetrk
flat/ noun a condition in which one
engine, displaced from the aircraft’s
centre-line is not working
asymmetric power asymmetric power /smetrk
paυə/ noun power on one side of the
aircraft’s centre line only
asynchronous asynchronous /ə|sŋkrənəs/ adjective
1. not happening at the same time or
rate
An asynchronous orbit is a 24-
hour orbit which enables a satellite to
remain overhead one part of the Earth’s
surface. 2. not in frequency or phase
asynchronous computer asynchronous computer /e|
sŋkrənəs kəm|pjutə/ noun a computer
which does not process information
according to the internal clock
ATA ATA /e ti e/ abbreviation actual
time of arrival
ATC ATC /e ti si/ abbreviation 1. air
traffic control 2. air traffic controller
ATCC ATCC abbreviation air traffic control
centre
ATCRU ATCRU abbreviation air traffic control
radar unit
ATD ATD /e ti di/ abbreviation actual
time of departure
ATFM ATFM abbreviation air traffic flow
management
25 attenuate
ATIS ATIS abbreviation Automatic Terminal
Information Service
ATM ATM /e ti em/ abbreviation air traffic
management
atmosphere atmosphere /tməsfə/ noun 1. a
mixture of gases in a mass surrounding
the earth
The surrounding atmosphere
moves with the earth. 2. a unit of measurement
of pressure
COMMENT: The main gases found in
the atmosphere are nitrogen and
oxygen. The atmosphere contains less
than 1% carbon dioxide and argon,
　
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本文鏈接地址：Dictionary of Aviation上(24)