be on the trail of sb / sth

be on the trail of sb / sth to be trying to find someone or something by getting information about them跟踪，追踪（捕）某人/某物:•industrial spies on the trail of technological secrets盯上技术机密的商业间谍•Police believe they are hot on the trail of a drug-smuggling gang (=they are close to finding them) .警方相信他们很快就能找到贩毒团伙。

• blood vengeance
• put up one's plate in a certain street
• go off
• under control
• rope-lay conductor
• bell-bottom(ed)
• air wedge
• eruptional
• asking
• week in, week out
• shoehorn
• etherealities
• go round the houses
• beat sb to nothing
• ankle
• collaterality
• set sb/sth apart (from sb/sth)
• sew up
• qt.
• prankful
• ad quem
• int.al.
• inspirationist
• Port Sudan
• shrewdest
• next but one two
• cyclone
• sapotoxin
• driller's method
• thin cat
• clymenid
• glyceric acid
• irksomenesses
• inundatest
• stick-to-it-ive
• ltr.
• bring sth to sb’s notice
• Atlantic grey hounds
• teammates
• hold aloof from
• bully out of
• flyte
• promoters
• savoured
• kil
• resuscitation
• Anteros
• frontality
• destructionist
• front bencher
• control accuracy
• flaked stone
• desilverise
• towardliness
• membranes
• quilting
• Arthromitaceae
• ML.
• three-piled
• give the eye to
• beasts
• armor plate
• nucleoside
• raploch
• explain oneself
• assemblings
• come over sb
• strew
• bell magpies
• voicelessness
• grievant
• blazed trail
• nonconsumable electrode
• bathlessness
• the retail price index
• no longer
• Borrelia
• system programs
• CAFE
• refractedness
• osumilite
• jeepney
• enfold
• picador
• Cracidae
• puncheons
• as pleased as punch
• exex
• fainthearted
• chlorinated paraffin
• Church of Jesus Christ of Latter-day Saints
• spankings
• trapp
• cardiac muscles
• undersurface
• bas bleu
• Cammaerts, Émile (Leon )
• Grassman, Hermann Günther
• tailorings
• superatomic