不时,时常;偶尔,间或

学英语单词
actual stock
affination house
air defence works
ant poisoning
audio-frequency band
autoregulations
azoferridoxin
barderas
barner
bg(birmingham gage)
by-product coking
canary grasses
carbon pressure recording
catch of xolvent
caustic potashes
Chenin
CTR - click-through rate
data synchronizer channel
debye formula for specific heat
decomposer organism
Diadematacea
dimensional analysis
draft air duct
duetists
dump circuit
dynamostatic
electron image
electrostatic bonding
erect crane
Fawood
flattened square head bolt
fore-and-aft-rigged
forming effect
fractional void volume
frisking
gas filled type explosion proof machine
glacier survey
go under the knife
guwahatis
Gyrus temporalis medius
hard alloy cutter
heavenric
helianthus angustifoliuss
honigan
hydnum repandum
in pity of
insignes
intermodal transportation
jacksboro
Korean
long file name
lost-luggage
macroeconomic loss function
mass of 1000 kernel
mommify
multipurpose electron tube
narrative structure
negative resistance oscillator
nucleolar organisers
OMR type reactor
one's money's-worth
open segment
Orcopampa
ouchterlony gel diffusion
palaeanthropologists
parliamentary bar
parting gifts
permie
pishachi
poison glands
polar-fiber
practised
pseudoparallel
rainfall-temperature diagram
redistributors
reel fore-and-aft adjuster
run at sb
scattered pulse
screen settling
scrubbird
ship's crew
shottas
siena
single standard
standard volume indicator
stannous oxide
subdivisional
syndrome of cerebellar hemisphere injury
synthetic varnish
taped up
Tasman Plat.
temperature-gradient zone melting
Thatcher, Margaret
throte
uk instructor
ultra-lefts
unitholders
Venae medullae oblongatae
weed vine
wise-crackings
write-lock memory
youthness