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radar
snap roll snap roll /snp rəυl/ noun a
manoeuvre in which an aircraft turns a
complete circle longitudinally while
maintaining altitude and direction of
flight
snow snow /snəυ/ noun atmospheric water
vapour frozen into ice crystals and falling
to Earth as white flakes
Snow
cover tends to persist on north-facing
slopes of mountainous regions after it
has melted on south-facing slopes.
snowfall snowfall /snəυfɔl/ noun a quantity
of snow which comes down at any one
time
a heavy snowfall
snowflake snowflake /snəυflek/ noun a small
piece of snow formed from a number of
ice crystals
The size of a snowflake
depends on the temperature.
snow plough snow plough /snəυ plaυ/ noun a
vehicle built to push the snow from
roads, tarmac, etc.
snowstorm snowstorm /snəυstɔm/ noun a
heavy fall of snow accompanied by
wind
The airport is closed because of
the snowstorm.
soft soft /sɒft/ adjective not hard
Thermoplastic
materials become soft when
heated.
soften soften /sɒf(ə)n/ verb to make soft

Thermoplastic materials are softened
by many aircraft fluids.
solar solar /səυlə/ adjective referring to the
sun
solar-powered solar-powered /səυlə paυəd/
adjective powered by energy derived
from the suns rays
‘…a 210–240-foot wingspan solarpowered
aircraft for flight at 100,000 feet,
is being designed in California’ [Pilot]
solar radiation solar radiation /səυlə redi|
eʃ(ə)n/ noun the total electromagnetic
radiation given off by the sun
solar system solar system /səυlə sstəm/ noun
the sun and the planets governed by the
sun
sole sole /səυl/ adjective only
the sole
survivor of the air crash
solenoid solenoid /sɒlənɔd/ noun a cylindrical
coil of wire acting as a magnet when
carrying electric current
Fuel is
metered from the aircraft fuel system by
a solenoid-operated control valve.
solid solid /sɒld/ adjective 1. referring to
something which is not liquid or gaseous

Visibility is reduced by the presence
of solid particles such as dust or
sand in the atmosphere. 2.  solid line
unbroken line  noun a substance which
is not a liquid or a gas
Ice is a solid,
water is a liquid and vapour is a gas.
solid-state solid-state /sɒld stet/ adjective
referring to semiconductor devices
solid-state device solid-state device /sɒld stet d|
vas/ noun an electronic device that
operates by using the effects of electrical
or magnetic signals in a solid semiconductor
material
solid-state technology solid-state technology /sɒld
stet tek|nɒləd"i/ noun technology
using the electronic properties of solids
to replace those of valves
solo solo /səυləυ/ adverb done by one person
alone
to go solo or to fly solo
He
flew solo across the Atlantic.
solution solution /sə|luʃ(ə)n/ noun 1. an
answer to or means of solving a problem
or difficulty
The navigation computer
or slide rule is suitable for the
solution of many different types of
mathematical problem. 2. a liquid made
by dissolving a solid or gas in water or
some other fluid
Spillage from a lead
acid battery may be neutralised by
washing with a dilute solution of
sodium bicarbonate.
solve solve /sɒlv/ verb to find the answer to,
or a way of removing, a difficulty or
problem
The triangle of velocities is
used to solve navigation problems.
213 south-west
somewhat somewhat /smwɒt/ adverb to
some extent, a bit
The usefulness of
pure aluminium as a structural material
is somewhat limited.
sonic sonic /sɒnk/ adjective 1. referring to
sound 2. within the human hearing
range  sonic speed the speed of sound
sonic boom sonic boom /sɒnk bum/ noun a
noise, due to shock waves, produced
when an aircraft travels through the air
faster than the speed of sound
sophisticated sophisticated /sə|fstketd/
adjective highly developed and complex

The electronic flight instrument
system, commonly known as EFIS, is a
highly sophisticated type of flight director
　
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本文鏈接地址：Dictionary of Aviation下(73)