[口语]说不上,不知道:

I can't say that I care for the fashion of that dress.
说不上我是不是喜欢那种套服的式样。[表示委婉的否定]

学英语单词
acutest
American breakfasts
archival-storage condition
arcsecants
asphygmia
auctorial
balancing coil
bar locking
Beyoglu
calcic horizon distribution
cane-trash
castagnet
catalyst reactivation
cedistabil
consolute
contortionists
corporativism
cruse
cystic follicle
darklings
deaf education
dichloro-propionanilide
dilawar
double helical gear (herring-bone gear)
draft memo
dynamize
e.s.u.
Eisleben
el-hai
eleona
Eulerian circuit
external tapping
extracture
FORTRAN 77
Foucault's pendulum
fractional electric charge
free storage
Gene Autry
glebeless
grooveless
hand fire alarm device
HNPF
homburger
image transmitter power
Jackie Kennedy
Jolof
kissy-kissy
landwash
laryngoscleroma
light-float
liked to
loricating
lumbar cancer
lyxulose
magnetohydrodynamics
mechanical shutter
medical missionary
mendicities
metarteriole
method of one probe spreading resistance
mexican diamond
monophonic reproduction
mouthacho
Nieul
no observed effect concentration
nodal method of analysis
non-monetary accounts
Old Andreafsky
over-knee
overpressurisation
paceman
perved
photoreleases
pre-reaction
pyramid of life
qualified reference
quartz-crystal subaqueous microphone
read and write statement
resistive padding
rhabdomyomas
Rhododendron thayerianum
roughing hand taper reamer
Ruocid
Saint Giles' disease
sexploit
shitscapes
speckle-shearing
spring silkworm
stand aloof
Steenrod squares
tantalise
thermohydraulic effect
translation class
trimecaine
trophic-level
upper trough (upper-level trough)
Virchow's psammoma
watch your step
Wawota
winter rye
word-organized memory
yaah