introduction; presentation; referral; showcase (of a product)
three; three years of age
discovery; detection; finding
this; last (couple of years, etc.); these; you (as in "you liar")
educational institution; school; academy; campus
(afternoon) nap; sleeping during the day; siesta
actually; really; truly; in practice; practically
floating; drifting; suspension; (arch.) wandering (about)
treasure house; storage for valuable property
one (thin, flat object); one sheet
to stop walking; to pause
island; one's territory (of a sex worker, organized crime gang, etc.); one's turf
explanatory note; explanatory text; explanation; caption
usual; normal; everyday; usually; normally; generally
to make an appearance; to show up
several years; a few years
few decades; many decades; several decades
irregular (schedule, service, etc.); indeterminate (length of time); staggered (payments)
appearance; emergence; advent; arrival; showing up; coming to existence
throughout; over a period of ...; over a span of ...
staying in the air; remaining airborne
later; afterwards; future; after one's death; (arch.) descendant
again; once more; also; too; on the other hand; while; and
ancient civilization; ancient civilisation
in name only; figurehead; (only) by name
almost; nearly; hardly; barely; large majority; large proportion
investigation; examination; inquiry; enquiry; survey
riddle; puzzle; enigma; enigmatic; mysterious
full of (e.g. mistakes); riddled with; covered all over with (blood, mud, etc.)
near; close; close (in time); soon; close (relationship); friendly
dwelling; house; home; den (of criminals, demons, etc.); nest
special; particular; extraordinary; exceptional; especial
once; before; formerly; never yet; never before; first time
devil; evil spirit; genie
to make war (on); to wage war (against); to compete (against); to struggle (against adversities, etc.); to fight
to protect; to guard; to defend; to keep (i.e. a promise); to abide (by the rules); to observe
great; grand; magnificent; outstanding; mighty
to be called ...; to be referred to as ...
cry (of an animal); call; chirp; song; caw; roar
alternation of generations; heterogenesis; change of generations; emergence of a new generation
one theory; one opinion; another theory