Dictionary of Aviation上(60)

曝光台 注意防骗 网曝天猫店富美金盛家居专营店坑蒙拐骗欺诈消费者

type of cloud associated with thunderstorms

A cumulonimbus has a characteristic
anvil shape. Abbreviation CB
cumulus cumulus /kjumjυləs/ noun big,
fluffy, white or grey cloud heaped or
piled up, which develops at low altitude

Cumulus clouds may develop because
63 cylindrical
of thermal activity resulting from the
warming of the surface.
Grey cumulus
often develop into cumulonimbus.

altocumulus, stratocumulus
cumulus cloud cumulus cloud /kjumjυləs
klaυd/ noun clouds which form only in
an unstable atmosphere and, as the
name suggests, often build vertically for
great distances. Also called heap cloud
current current /krənt/ adjective present,
actual, happening at the moment  current
weather conditions present
weather conditions  current position
the position now  noun 1. an electrical
supply
alternating current
direct
current 2. flow
curvature curvature /k%vətʃə/ noun a curved
shape  curvature of the earth the
curving of the Earth’s surface due to the
spherical form of the Earth
customary customary /kstəməri/ adjective
normal or usual
It is customary for the
senior cabin supervisor to introduce
herself to passengers at the start of a
flight.
customs customs /kstəmz/ noun an official
department of government concerned
with movement of people and freight
across national borders  customs aerodrome
an aerodrome, usually near a
border or coast, with customs facilities
customs duty customs duty /kstəmz djuti/
noun same as import duty
the duty
payable on a carton of cigarettes
cycle cycle /sak(ə)l/ noun a series of
actions which end at the same point as
they begin
With the piston engine, the
cycle is intermittent, whereas in the gas
turbine, each process is continuous. 
life cycle of the thunderstorm cell the
process of formation, development and
decay of a thunderstorm
cyclic cyclic /sklk, saklk/, cyclical
/sklk(ə)l/ adjective referring to or
happening in a cycle
Off-shore and
on-shore wind patterns are cyclic.
cyclone cyclone /sakləυn/ noun a system of
winds rotating inwards to an area of low
barometric pressure
These areas of
low pressure are called hurricanes in
the Atlantic Ocean, cyclones in the
Indian Ocean and Bay of Bengal, and
typhoons in the China Sea. Also called
low, depression
cyclonic cyclonic /sa|klɒnk/ adjective referring
to air movement, which turns in the
same direction as the Earth and which,
when seen from above, is anticlockwise
in the northern hemisphere and clockwise
in the southern hemisphere
In
winter the sub-tropical high retreats
and gives way to cyclonic pressure patterns
which produce cool unsettled conditions
with rain at times.
cylinder cylinder /slndə/ noun a device
shaped like a tube, in which a piston
moves
Smaller aircraft have a static
hydraulic system similar to a car, with a
master cylinder and individual brake
cylinders at each wheel.  cylinder
block the casing containing the cylinders
in a internal combustion engine 
cylinder head the removable top part of
a piston engine cylinder containing
plugs, inlet and exhaust connections
and valves
cylindrical cylindrical /s|lndrk(ə)l/ adjective
with the shape of a cylinder
The modern
jet engine is basically cylindrical in
shape.
D
DD abbreviation danger area
DADA abbreviation danger area
DAAIS DAAIS abbreviation danger area activity
information service
DACS DACS abbreviation danger area crossing
service
DADC DADC abbreviation digital air data
computer
DADS DADS abbreviation digital air data system
DALR DALR abbreviation dry adiabatic lapse
rate
damage damage /dmd"/ noun harm that is
caused to something
If the temperature
rises it can cause serious damage
to the engine.  verb to cause harm to
something
Small stones around the
run-up area may damage propellers.
damage tolerance damage tolerance /dmd"
tɒlərəns/ noun the ability of a material
or structure to withstand or resist damage

The structural efficiency of
bonded and machined structure is not
achieved at the expense of damage tolerance.
dampen dampen /dmpən/ verb 1. to
decrease or reduce
An accumulator is
　
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