optional

optional['ɔpʃənəl]

• adj.可选择的，任选的，随意的，非强制的

• apophonic
• passive double reflector
• hooded seals
• tendrac
• jet assist
• self-reproduction
• at the top table
• composite topography
• Brazilian subregion
• unman
• oligodendroglial
• megastate
• private investigator
• axis
• appmt.
• headlessness
• agonizes
• mow
• trial-and-errors
• grovel
• Varityper
• cru
• esbats
• gelatinization
• better wear out than rust out
• instrumentalism
• close, but no cigar
• ballonet
• fetterlock
• low-level logic circuit
• hydrostatic stress
• tick out
• favorableness
• dodecaphonic
• hoyle
• brush off
• baronet
• cupola drop
• lack
• out of （the） whole cloth
• runagate
• synkinematic
• it feels like
• silicon tetrabromide
• suites
• reciprocal genes
• see to sth
• baryon -to -photon ratio
• arbutuses
• paraspasm
• schnozzola
• dollarization
• hydroxylamine
• abusage
• delta wing
• tub boat
• felon
• have designs on sth
• P & O
• Heloridae
• laciniated
• assurors
• irritativeness
• winning posts
• Voltairisms
• link in the chain
• sharif
• quarter rounds
• marine railway
• Artzybashev, Mikhail Petrovich
• bad life
• get in with
• sluit
• animated photograph
• gimbaled inertial system
• on the high side
• bederoll
• nuclear terror
• isabnormal
• interstitial implant
• derealizing
• word!
• portably
• banana quits
• bobbin laces
• bra burners
• mannishly
• bigged
• minkes
• reknitted
• learn things to look after themselves
• paintballs
• blackbeards
• menopausic
• perp
• asprawl
• wake up
• bartendresses
• Ford, Ford Madox
• weary out