opt in (to sth)

ˌopt ˈin (to sth)to choose to be part of a system or an agreement决定加入；选择参与

• pack journalism
• Addison's cheloid
• Tralee
• Brummie
• schoolfellow
• tortugas
• have an aptitude for
• asls
• hyphenic
• Cranmer, Thomas
• imogene
• avant-corps
• resumptively
• knobstick
• acorn barnacles
• cichlids
• forgetfuls
• orchitic
• bell-punch
• make one's Jack
• torpidnesses
• trophoneurosis
• picayunes
• give wings to
• mercurize
• be in the right
• cholera infantum
• stang
• counter-terrorist operation / team / unit etc
• ocean basin
• differential operators
• sharp work
• join up
• time bomb
• thin on top
• Aryanising
• acceleration coefficient
• trickle irrigation
• Littorinid
• triangularly
• hydrometallurgical
• unchecked
• Karlsruhe
• gentleman of industry
• self-searchings
• moisteners
• spendthrift trusts
• trinocular
• yukking
• night coach
• first option
• midsagittal section
• vintagers
• anthropophagite
• nearish
• resinlike
• catlap
• bracket fungus
• dizain
• in the open air
• quantum state
• beautied
• ampullulae
• the norm
• as rare（或 scarce）as hen's teeth
• lard-bucket
• bemean
• gaillardias
• drapings
• Yenbo
• offshore bar
• sulphurators
• mallee fowls
• electromagnetic coupling
• colluders
• burins
• give place to sb/sth
• paradoctors
• marginal blight
• dynamic geomorphology
• underbunching
• on the other side of the fence
• crush down
• subsistences
• spirillum
• metropolis nations
• as you think proper
• neologically
• msrs
• phycologists
• clotbuster
• fluid ounce
• broodies
• pyknic
• compurgatory
• middle Cs
• a fury of sth
• stand on one’s defence
• godspeeds
• alkanes