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booster booster /bustə/ noun a device
which increases the force or amount of
something
booster pump booster pump /bustə pmp/ noun
a centrifugal pump often positioned at
the lowest point of a liquid fuel tank to
ensure positive pressure in the supply
lines to the engine
Fuel is fed through
a filter and a booster pump.
The purpose
of the booster pump is to prevent
fuel aeration.
boot /but/ noun one of a set of flat,
flexible tubes bonded to the leading
edge or wings and other surfaces which,
when pressurised with fluid, break up
ice
The boots on the leading edge of
the wings were damaged by hail.
bottleneck 34
bottleneck bottleneck /bɒt(ə)lnek/ noun a
buildup of air traffic causing delays in
taking off or landing
bound bound /baυnd/ adjective  bound for
on the way to
an aircraft bound for
Paris  the Copenhagen-bound flight
the flight on the way to Copenhagen 
outward bound leaving home, especially
for another country
boundary boundary /baυnd(ə)ri/ noun a physical
or imaginary limit between two
areas
The boundary between two air
masses is called the frontal surface.
boundary layer boundary layer /baυnd(ə)ri leə/
noun the layer of fluid next to the surface
over which it is flowing and,
because of friction, travelling more
slowly than layers further from the surface
bowser bowser /baυzə/ noun a mobile fuel
tank for refuelling aircraft
It is important
to prevent the possibility of an electric
spark by earthing the aircraft and
the bowser.
Boyle’s Law Boyle’s Law /bɔlz lɔ/ noun a scientific
principle that states that the volume
of a given mass of gas, whose temperature
is maintained constant, is
inversely proportional to the gas pressure
brace brace /bres/ verb 1. to strengthen a
construction using cross-members
and/or wires
Early aircraft were of the
braced type of construction. 2. to take a
protective body position in preparation
for a crash landing
The cabin-crew
will repeat the ‘brace’ order and brace
themselves.  to brace yourself to
quickly prepare yourself mentally and
physically for what is shortly to happen
brace position brace position /bres pə|zʃ(ə)n/
noun the position that a person is recommended
to adopt before impact in a
crash, protecting the head with the arms
and bringing the legs up underneath the
chest
bracket bracket /brkt/ noun 1. a metal
support, often triangular or L-shaped 
component bracket a metal device to
attach and support a component 2. a
range of frequencies within a band of
radio frequencies
Terminal VOR is in
the frequency bracket 108–112 MHz. 3.
 round brackets the printing symbol (
) used to separate words in a sentence,
or within a text  square brackets the
printing symbol [ ] used to enclose
some types of text
brake brake /brek/ noun a device for stopping
a vehicle or a machine  parking
brake a brake used to prevent the aircraft
moving after it has come to a stop
 verb to slow down or to stop by pressing
the brakes
He had to brake hard
after landing in order to turn off at the
correct taxiway. (NOTE: braking –
braked)
brake drum brake drum /brek drm/ noun a
round hollow part of the brake mechanism,
which is attached to the wheel
and against which the brake shoes rub,
thus preventing the wheel from turning
braking braking /brekŋ/ noun the act of
putting on the brakes to slow down or to
stop  adjective slowing down
the
braking effect of drag
action
breaking load breaking load /brekŋ ləυd/ noun
a load capable of being supported
before a structure breaks
breather breather /briðə/ noun 1. a pipe connecting
the crankshaft to the atmosphere
to prevent build-up of crankcase
pressure 2. a short rest (informal )  to
take a breather to have a short break,
to relax before starting again
breeze breeze /briz/ noun a gentle wind
especially near the coast
There’s no
wind, not even a breeze.  land breeze
a light wind which blows from the land
towards the sea
Land and sea breezes
occur in coastal areas.  sea breeze a
gentle wind which blows from the sea
towards the land
The strength of the
sea breeze decreases with height.
brief brief /brif/ adjective short  brief
　
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本文鏈接地址：Dictionary of Aviation上(33)