sneak up (on sb/sth)

ˌsneak ˈup (on sb/sth)to move towards sb very quietly so that they do not see or hear you until you reach them偷偷走近He sneaked up on his sister and shouted ‘Boo!’.他偷偷溜到妹妹身边，然后大喊一声“嘿！”

• bronchoscopist
• wave number
• savable
• lower chambers
• calorie
• nacre
• be all mouth and trousers
• rifest
• baloos
• romanticized
• famous for fifteen minutes
• satays
• sphincter anis
• bookishness
• chiefesses
• Pteranodon
• wingbeat
• humidify
• offer itself
• scent gland
• urolithiasis
• epidermolysis
• according to circumstances
• Fibro
• there and thereabouts
• neencephalon
• linear electrical constants of a uniform line
• basicities
• Wuchereriasis
• Microcystis
• outeat
• eat crow
• back-seat drivers
• RTA furniture
• sound-thieves
• paradise bird
• spirometers
• megagame
• bawdinesses
• defensive research
• partiality
• petrified wood / trees etc
• nova lisboas
• categorising
• Mach wave
• up to the （或 one's） eyes （in）
• passer-by
• heteroauxins
• programme register
• standby
• retiree
• quadrant electrometer
• telecastings
• Sem.
• wind gages
• for the purpose of
• left-hand rule
• blow something up
• flak suit
• foramen of Monro
• ill-bred
• multi-gym
• ultrafilters
• transfluent
• dead spindle
• cosm-
• quickstepped
• trotlines
• have trouble with
• World Islamic Congress
• terbutylhylazine
• belong under
• gapeworm
• meet ... halfway
• bid fair to
• Boraginaceae
• Pan-Britannic
• chant sing the praises of someone
• laser orchestra
• de profundis
• Exogyra
• that does it
• delightsomeness
• sport shirt
• organbird
• nonhistone protein
• metamorphosizes
• julys
• have fond memories of sth / sb
• have a point
• full-frills
• concentration polarization
• terrorisers
• month by month
• on the motion of
• woodsides
• fellowship in misfortune
• aah
• gramradio
• lightning never strikes (in the same place) twice