a. 易受攻击的
s. not defended or capable of being defended

【近义词】
学英语单词
'till
acetylene flame
aloofliest
anophthalmic
antagonistic spring
anterior neuroplasm
apex vesicae urinariae
arch bar tender truck
asset tracking
bali dance company
Bampton, Récifs
barklyite (ruby)
baseband shaping
be unable to hear oneself think
beguild
berm crest
besikta
big muscle activities
booking memo
Boot code
C. of F.
Caribbean time
Chlorobaculum
climax biotic community
clutch half
cobblers' dance (russia)
container tipping
corviglia
count-down
curve of error
cutaway models
de Seversky, Alexander procofieff
deep cooling
elasticity of demand or supply
end-packing
ethylene-butylene copolymer
eyepiece lens
fiberglass reinforced plastic construction
field deflection
flash plate
foil laminated film
forefend
gai-jin
Garbahaarey
Grovania
half-word instruction
i agree
in touch (with)
insulating jacket
intermittency beat
intermittent feed
ISDS
landscaping
latitude determination
leazed
lessley
lighting set-up
machinesewed
manoeuvering air
multitasking control
nucleus estate
o-carboxyphenylglyoxylic acid
outbreak herbivore
overvoltage device
partial path name
pearl lugger
peat bed
Pebo
plasticus
poister
potassium cyanide
purchase plan
QDX
radiological assistance plan
railway freight traffic organization
railway high speed traffic
reengaged
riding lamp
Saivism
salt controllable dye
second harmonic generator
Sinkāt
slumpy
stencil paper
successive reciprocating
Terrier'svalve
theater curtains
then and not till then
time variation of gain
total perspective
tritide
uncrumple
unpublished materials
unwritten rules
waterline paint
weighting fee
weissner
white vasoline
wood-sere
yellow spot coloboma