essentially the same with only minor differences
(the) mainstream; main course (of a river); main stream
to smash; to crush; to shut down; to put out of business; to wreck; to break; to butcher
at any rate; in any event; either way; anyway
keeping alive longer; prolonging life; life extension; life-support
to fix (a time, date, etc.); to set; to expect; to hope for; to resolve (to do); to decide upon
goes without saying; needless to say; obvious
ringleader; main culprit; main cause; source
lifespan; life; lifetime; life (of a battery, lightbulb, etc.); service life; end of an object's (useful) life
most suitable; optimum; optimal; best
to press forward; to forge ahead; to push on
for a long time; since long ago; from childhood; bright and early; early in the morning
capable; able; talented; promising
party; set; gang; company; person
unceasing; never-ending; endless
to refuse; to reject; to decline; to prevent (from doing); to deny (e.g. access); to block
experiments using animals; in-vivo testing; animal testing
room; wife (of someone of high rank); scabbard; Chinese "Encampment" constellation (one of the 28 mansions)
popular name; common name; nickname; alias
skill; ability; dexterity; performance; workmanship; craftsmanship
diligent; hard-working; industrious
blunder; miss; slip; oversight
check (pattern); plaid; check; inspection; check (mark); tick; checking (something) out
drawing a katana and attacking in the same stroke; doing (something) suddenly and without warning; doing without prior notice
naming; nominating; designating; calling on; asking for; requesting
to use completely; to use up; to exhaust; to exhaust someone's civility; to give up (on someone)
improvised; impromptu; extemporaneous; off-the-cuff; ad-lib
performance (e.g. music, dance, drama); something done (just) for show; theatre; performance (of a computer, car, investment, etc.)
capable person; talented person; human resources; personnel
excavation; exhumation; digging up; discovery (of a new fact, talent, etc.); finding; unearthing
flexibility; pliability; softness; elasticity
to happen to have; to have on hand; to carry (e.g. money)
to be conspicuous; to stand out
appointment; assignment; promotion
matter of time; question of time
death during surgery; intra-operative death; operational death
by the way; incidentally; sometimes; occasionally; precisely (at that time); exactly
unexpected; contrary to expectations; by chance; casual
time; season; period; phase; stage