concentrate one’s attention on/upon

concentrate one’s attention on/upon集中注意力于：That chemist was concentrating his attention on his experiment，he did not notice his wife standing behind him.那个化学家正把注意力集中于他的实验上，他没有注意到他的妻子站在他的身后。

• highwalls
• shadow-cast
• hfr strain
• monophonic
• Hurri
• add sth↔on (to sth)
• Ogden
• thermoperiodism
• compound microscopes
• alors
• unciforms
• ONC
• conventional
• keel
• Flexility
• ride/walk roughshod over
• job search
• be wanting
• broken records
• racists
• snowfalls
• hetairic
• toe hole
• mistakingly
• Dauphine twin law
• follicular lymphoma
• ostensibility
• Retgers law
• zool
• cost-benefit
• bow nets
• contrasuggestible
• hippocentaur
• aquatintists
• rat on sb
• sell yourself
• phoniness
• beneficently
• nonobedient
• test-tube
• in time of need
• partial condensation
• ride blind
• be friends with
• make no reckoning of
• marketmen
• telegraph lines
• endoenzyme
• anoscope
• soft lens
• exalted-carrier receiver
• Karman cannula
• moon car
• conducive
• touracoes
• duiker
• fibromyositis
• sonographies
• puncheon
• a good day's work
• highwaywomen
• bile duct
• debeak
• somnolence
• introitus
• sword beans
• ultramafic
• the ratings
• thus
• psychedelicize
• Boerhaave, Hermann
• Ali
• cafeteria
• dapping
• craniologists
• auriscopic
• turn it up
• appositionals
• renderest
• Vancouver, George
• reveal itself
• Sinuiju
• white lead ores
• lunar fuel tanker
• slack-water
• prospectings
• gestural
• disequilibria
• aerosols
• rotches
• gingerish
• allotters
• Crepidotus
• domestic fowls
• pattern recognition
• lactescence
• cerate
• master antenna television system
• lepidine
• intervenor