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operations
matrix matrix /metrks/ noun a grid-like
arrangement of circuit elements
Oil
coolers consist of a matrix, divided into
sections by baffle plates.
matter matter /mtə/ noun 1. a physical
substance
Mass is a basic property of
matter.  foreign matter something
unwanted which is found in a substance
or a device (such as sand or water in
fuel)
Turbine blades can be damaged
by foreign matter such as stones entering
through the engine intake on takeoff.
 solid matter solid substances 2. a
subject for discussion, concern or
MATZ 146
action
Safety is a matter of great
importance. 3. trouble or difficulty 
what’s the matter? what’s the problem?
 it doesn’t matter it isn’t important,
so don’t worry
MATZ MATZ abbreviation military aerodrome
traffic zone
maximum maximum /mksməm/ adjective
greatest possible
The maximum daily
temperature is 35°C.
The maximum
speed of the aircraft is 200 kt.  noun
the greatest possible quantity, amount,
etc.
There is a net gain of heat by the
Earth until terrestrial radiation balances
solar radiation when the daily
temperature is at its maximum.
maximum total weight authorised maximum total weight authorised
/mksməm təυt(ə)l wet
ɔθərazd/ noun the maximum authorised
weight of aircraft fuel, payload,
etc., given in the Certificate of Airworthiness.
Abbreviation MTWA
mbmb abbreviation millibar
MDA MDA /em di e/ abbreviation minimum
descent altitude
mean mean /min/ adjective referring to
something average, midway between
two extremes  mean daily temperature
average daily temperature  mean
wind the average speed of a wind 
noun something having a medium or
average position, midway between two
extremes  arithmetic mean the average
value of a set of numbers  verb 1.
to signify or to have something as an
explanation
Airspeed means the speed
of the aircraft in relation to the air
around it. 2. to intend to do something

I meant to telephone the reservations
desk this morning but I forgot. 3. to
result in
Installing a new computer
network means a lot of problems for
everybody. (NOTE: meaning – meant)
mean effective pressure mean effective pressure /min |
fektv preʃə/ noun the average pressure
exerted on the piston during the
power stroke. Abbreviation MEP
means means /minz/ noun a way of doing
something which brings a result
A
clear window fitted in the reservoir provides
a means of checking hydraulic
fluid level during servicing. (NOTE:
Means has no plural form.)  by means
of by using
Fuel is transferred from
the tanks to the carburettor by means of
pipes.  there are various means for
navigation there are various different
methods used for the purposes of navigation
mean sea level mean sea level /min si lev(ə)l/
noun the average level of the sea taking
tidal variations into account
Below
FL50 cloud heights are referred to a
datum of mean sea level. Abbreviation
MSL
mean sun mean sun /min sn/ noun the position
of an imaginary sun in a solar day
of exactly 24 hours, behind the real sun
in February and in advance of the real
sun in November
Local mean time
(LMT) is the time according to the mean
sun.
mean time between failures mean time between failures
/min tam b|twin feljəz/ noun
full form of MTBF
mean time to repair mean time to repair /min tam
tə, tυ/ noun full form of MTTR
measure measure /me"ə/ noun 1. an indication
or way of assessing
The way he
dealt with the in-flight emergency is a
measure of his skill as a pilot. 2. a reference
for discovering the dimensions or
amount of something
The litre is a
measure of capacity. 3. a device used
for measuring  a 1-metre measure a
ruler that is 1 metre long 4. an action
taken to get a result
Stricter safety
measures were introduced. 5. an
amount of something
To be a good
pilot, you need a measure of self-confidence.
 verb 1. to find the dimensions
or amount of something
to measure a
distance
to measure an angle
to
measure the speed of an aircraft
Wind
directions are measured from magnetic
north. 2. to be of a particular size,
length, quantity, etc.
How much does
the pipe measure?
　
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本文鏈接地址：Dictionary of Aviation下(13)