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upwards from the root to the tip.
slat slat /slt/ noun a movable device on
the leading edge of a wing which, when
extended, creates a gap that allows air to
pass smoothly over the top of the wing
thus reducing the possibility of a stall

The Socata Rallye is one of the few light
aircraft with leading edge slats.
sleet sleet /slit/ noun 1. melting snow or a
mixture of rain and snow falling
together 2. US frozen rain in the form of
clear drops of ice or glaze ice covering
surface objects (NOTE: Care should be
taken to avoid any ambiguity.)  verb to
fall in the form of sleet
It is sleeting.
slide slide /slad/ noun a device which
allows continuous movement over a
smooth surface  verb to move continuously
over a smooth surface
Shear
stress is the stress that resists the force
tending to cause one layer of a material
to slide over an adjacent layer. (NOTE:
sliding – slid)
slide raft slide raft /slad rɑft/ noun an
escape slide which, when detached
from the aircraft, can be used as a liferaft
slide rule slide rule /slad rul/ noun a graduated
device with sliding parts for performing
complex mathematical operations
slight slight /slat/ adjective small, minor 
a slight increase a small increase  a
slight drop in temperature a small
decrease in temperature
slip slip /slp/ noun a condition of uncoordinated
flight when the aircraft moves
towards the inside of a turn
Slip is
indicated by deflection of the ball in the
turn and slip indicator.  verb to move
sideways towards the inside of a turning
manoeuvre as a result of excessive bank
(NOTE: slipping – slipped)
COMMENT: To correct a slip, the pilot
should decrease the bank, or increase
rudder pressure on the same side as
the deflected ball in the turn
coordinator. Slips are often used in
aircraft with no flaps to increase the
rate of descent without increasing the
airspeed.
slippery slippery /slp(ə)ri/ adjective which is
difficult to grip firmly because of wetness,
smoothness, etc.
a slippery surface
such as a wet or snow-covered runway
slipring slipring /slprŋ/ a metal ring in a
generator to which current is delivered
by the brushes
slipstream slipstream /slpstrim/ noun the
flow of air sent backwards by an aircraft’s
propeller
slope slope /sləυp/ noun 1. a slanting surface
or slanting piece of ground, an
incline
A slope of the runway may
increase or decrease the take-off and
landing runs. 2. a state in which one end
of an aircraft is higher than the other 
verb to be inclined, to be at an angle

When the runway slopes upwards, away
from the aircraft, the approach may
appear to be higher than it actually is.
slot slot /slɒt/ noun 1. a groove or channel
into which something can be fitted

The float engages with a slot cut in the
tube, so that, as the fuel level changes,
the float moves up and down. 2. the particular
time at which an aircraft is
scheduled to depart
Flight GF 506
missed its slot and will have to wait 45
minutes for another.
smsm abbreviation statute mile
smog smog /smɒ$/ noun a mixture of
smoke and fog
Smog is now rare
because of pollution control.
smoke smoke /sməυk/ noun a white, grey or
black product formed of small particles
given off by something which is burning

The weather associated with visibility
reductions by particles suspended
in the atmosphere is classified either as
fog, mist, haze or smoke.  verb 1. to
give off smoke
Somebody noticed that
one of the engines was smoking. 2. to
breathe in smoke from a cigarette, cigar,
etc.
Passengers are not allowed to
smoke in the toilets.
smoke alarm smoke alarm /sməυk ə|lɑm/ noun
a warning system that will ring or light
smoking 212
up if there is smoke somewhere
Washrooms
are fitted with smoke alarms.
smoking smoking /sməυkŋ/ noun the act of
breathing in smoke from a cigarette,
cigar, etc.  the airline has a no-smoking
policy the airline does not allow
passengers to smoke during a flight
smooth smooth /smuð/ adjective 1. even and
without lumps or dents
a smooth surface
2. not rough or turbulent
High
ground will disturb the smooth, horizontal
flow of air. Opposite rough  a
smooth running engine an engine
which is operating well
SMR SMR abbreviation surface movement
　
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本文鏈接地址：Dictionary of Aviation下(72)