na. 就是;只有
[网络] 正是;除…外没有;不是别的

学英语单词
access bits
activated montmorillonite clay
adiabatic lapse rate of air temperature
Amplexiphyllum
analogue television
Askino
Ayoh, Bukit
Bilen
bilevel operation
carlston
celestial marriage
chessies
chromvanadizing
civic education
clown-like
cnu
common ash
continuously-variable transformer
deedee
Detroit rocking electric furnace
dimeromyces anisolabis
diphenylmethanol
diplomometer
double-action hydraulic press
drilling
emergency electric supply unit
Eurolex
fasciaplasty
forward purchasing contract
fringing reaf
gibbets
grating compound cavity
greaseburgers
Guinea plum
half-track car
halts
heteropappus hispidus arenarius
high curie point alloy
hindward
Holy Nail
interval valued functions
janse
jubarb
ketupats
limous
liquid-scintillation spectrometry
longitudinal stability criterion
lower-division
luffing jib
Mmathethe
monoculturalisms
monosomal
mordaciid
Mountfield
multi-loop system
multiple reflection echo
multiple-film
multiproteic
nephrotoxic serum nephritis
noise susceptibility
nonempathic
on site verification
open hatch bulk carrier
operator theory
opponent colours system
Organized exchange
P-alkalinity
papular perniosis
parrott
Passerina
pausings
performance quota
picture paper
pipe coil
pirouette renvers?e
professional neurasthenia
protein-coat
quiescencies
right atrial enlargement
saccatocarpus
sea worm
segno
Seidlitz powder
self-service banking
semi-tubular
semieducated
ship's cousin
shock test of extreme-pressure lubricants
shut it
Simushir, Ostrov
single offender
skeletal limestone
swinkhede
tent pole
trippiest
tunnel conductor
ultra-high speed
viteous humor
wrought iron pipe
xeralf
yagerman
zahle (zahlah)