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by suitable mechanisms.
stowaway stowaway /stəυə|we/ noun a person
who travels secretly by hiding in an
aircraft, or a ship, not paying the fare

The crew must be alert at all times to the
possibility of hijacking, bombs and
stowaways.
strain strain /stren/ noun deformation
caused by stress
strap strap /strp/ noun a long narrow strip
of fabric with a buckle  verb  to strap
in to fasten a seat or safety belt around
somebody
stratocumulus stratocumulus /strtəυ|
kjumjυləs/ noun a layer of small
cumulus clouds lower than altocumulus,
i.e. below 3,000 m
Light rain may
fall occasionally from stratocumulus.
stratosphere stratosphere /strtəsfə/ noun the
layer of the atmosphere which extends
from the tropopause to about 50 km
above mean sea level
A cumulonimbus
cloud may extend vertically, into the
stratosphere.
stratus stratus /stretəs/ noun a low-altitude
layer cloud
Drizzle falls from shallow
layer cloud such as stratus.
stream stream /strim/ noun a steady current
of a fluid
Thermocouple probes are
positioned in the gas stream, so as to
obtain a good average temperature
reading.
strength strength /streŋθ/ noun 1. the ability
of a material to take pressure or support
a load
Aircraft wheels require great
strength and are constructed in two
halves which are bolted together after
the tyre is fitted.
Magnesium does not
221 sub-beam
possess sufficient strength in its pure
state for structural uses, but when
mixed with zinc, aluminium, and manganese
it produces an alloy having the
highest strength-to-weight ratio of any
of the commonly used metals.  highstrength
materials materials which are
very strong 2. the degree of clarity and
volume of a signal
A radio wave loses
strength as range increases. 3. the
degree of dilution of a liquid
Incorrect
mixture strength may cause detonation.
4. intensity of radiation
The strength
of the sun’s radiation varies with latitude.
5. the speed and force of a wind

High ground will disturb the smooth
horizontal flow of air, with the degree of
disturbance depending upon the
strength of the wind and the roughness
of the terrain.
strengthen strengthen /streŋθ(ə)n/ verb to
make strong or stronger
Some alloys
are hardened and strengthened by heat
treatment.  the wind is strengthening
the wind is increasing in speed
strengthening strengthening /streŋθ(ə)nŋ/ noun
1. the act of making stronger
Aircraft
which require large apertures in the
fuselage for freight doors, etc., need
increased strengthening around these
areas. 2. the fact of becoming stronger

strengthening of the wind
stress stress /stres/ noun 1. the load per unit
area to which a body that resists distortion
or change of shape is subjected by
internal forces
Turbine blades in the
average jet engine vibrate at frequencies
of 1 million per minute, and in each
cycle experience stress. 2. a worried,
anxious and tired state brought on e.g.
by overwork
He gave stress as the
reason for wanting a week off work. 3.
emphasis  verb to emphasise
It must
be stressed that the description is a
model and departures from it often
occur.
stretch stretch /stretʃ/ noun a continuous
unbroken length
a stretch of coast 
verb to extend or enlarge beyond the
proper limits
Tensile stress or tension
is the resistance of a material to being
stretched.
stretching stretching /stretʃŋ/ noun extending
or enlarging beyond the proper limits

Tensile stress is the resistance to
pulling apart, or stretching, produced
when two forces in opposition act along
the same straight line.
strict strict /strkt/ adjective precise, exact

Fuels for aircraft must conform to
strict requirements.
All generator
voltages, frequencies and their phase
sequence must be within very strict limits
to ensure proper system operation.
strike strike /strak/ noun an impact or collision
 verb to hit (NOTE: striking –
struck)
stringer stringer /strŋə/ noun a thin metal or
wood strip which goes from one end of
the fuselage to the other
Stringers are
made of a light alloy material.
strip strip /strp/ noun a long narrow piece,
usually of the same width from end to
end
a strip of paper  verb to dismantle
　
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本文鏈接地址：Dictionary of Aviation下(81)