necessary; needed; essential; necessity; need; requirement
life; life force; lifetime; lifespan; most important thing; foundation
to tie; to fasten; to hitch; to secure (trust, patronage of customers, etc.); to keep (an employee, someone's interest, etc.); to save (someone's life)
while; during; while; although; all; both
donor (blood, organ, etc.)
to search for; to look for; to hunt for; to search (a house, pocket, etc.); to search through; to rummage in (e.g. a drawer)
to be found; to be discovered
to leave (behind); to leave (undone); to not finish; to save; to set aside; to leave (to someone, esp. after one's death)
hand; arm; forepaw; foreleg; handle; hand; worker
human leukocyte antigen; HLA
to show; to display; to make (something or someone) look ...; to present an appearance of ...; to make (something) worth watching; to be entertaining; to have (something) looked at (by a specialist)
ah!; oh!; yes; indeed; aah; gah
terrible; dreadful; amazing (e.g. of strength); great (e.g. of skills); to a great extent; vast (in numbers)
reaction; response; physical reaction (to a stimulus); observable response (of an organism); reaction; effect
thesis; essay; treatise; paper; article
research; study; investigation
(a) step; one step; level; stage; small degree; small amount
advance; moving forward; progress
chemical substance; chemical
by means of; due to; because of; according to
cell; cell (in an organization, esp. a communist party)
about 80%; almost certainly; mostly
success; achievement; succeeding (in life); (worldly) success; prosperity
to be seen; to be visible; to look; to seem; to come
to come (spatially or temporally); to approach; to come back; to do ... and come back; to come to be; to become
low (rank, degree, value, content, quality, etc.); low (position); close to the ground; short (height); deep (voice); in a low key
to determine (esp. a culprit or underlying cause); to pin down; to ascertain; (arch.) to stab to death
you have only to; all you have to (do); all that's required; as long as; if only
present stage; current phase; current rank; present grade
enough; sufficient; sufficiently; fully; division into ten
to be able to do; to be possible; to be good at; to do well; to come into existence; to form; to be made
at once; immediately; right now
arrangement; preparations; search (by police)
the world; society; sphere; circle; world-renowned; world-famous
to be surprised; to be taken aback; to be amazed; to be frightened; to be startled; to be alarmed
induced pluripotent stem cell; iPS cell
to cross over; to cross; to pass through; to exceed; to surpass; to be more (than)
furthermore; again; after all; more and more; moreover; even more
once; one time; one round; one game; one bout; one heat
verification; confirmation; on-site inspection (by a judge, investigator, etc.) to gather physical evidence; verification