to lose; to miss (a change, opportunity); to lose (a loved one); to be bereaved of; to concede (goals, points, etc.)
to be at a loss; to be puzzled
experiments using animals; in-vivo testing; animal testing
to change; to exchange; to convert; to renew; to throw a switch; to replace
have no choice; there is nothing but; no more than
cat (esp. the domestic cat, Felis catus); shamisen; geisha; wheelbarrow; clay bed-warmer; bottom; submissive partner of a homosexual relationship
how; in what way; why; for what reason; cannot possibly; no way
as a child; when one was a child; childhood
laboratory; seminar room; professor's office
to go; to move (in a direction or towards a specific location); to proceed; to take place; to pass through; to come and go; to walk
time; hour; occasion; case; chance; opportunity
coincidence; chance; by chance; unexpectedly; contingency
image (on a screen); picture (e.g. on a TV); video; film; reflection; image (in one's mind)
to finish; to stop; to close (a business, etc.); to close down; to put away; to put back
at that time; at that moment; then; on that occasion
to wait; to await; to look forward to; to depend on; to need
dark; gloomy; depressed; dispirited; dark (in colour); dull; ill-boding
eye; eyeball; eyesight; sight; look; stare; notice
development; growth; development (of a situation, story, etc.); advancement; playing around; having an active sex life
happiness; good fortune; luck; blessing
such; that sort of; that kind of; no way!; never!
human being; human; person; character (of a person)
selfish; self-centred; egotistical
here; this place; this point; here; these past ... (e.g. three years); these last ...
to stop (an activity); to cease; to discontinue; to cancel; to abandon; to give up
(good) result; outcome; fruits (of one's labors); product; accomplishment
to get; to earn; to understand; to comprehend; to receive something undesirable (e.g. a punishment); to get (ill)
going side-by-side; going abreast; running concurrently; occurring at the same time; keeping pace with
example; illustration; precedent
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)
that's the way it is; such is life
to collect; to assemble; to gather
or; either ... or; maybe; perhaps; some ... and others ...; sometimes ... and at other times ...
consequence; outcome; result; blame
until then; till then; to that extent; the end of it; all there is to it
special; particular; peculiar; unique
custom; practice; said; aforementioned; instance; example
oneself; oneself; for oneself; personally
proof; testimony; demonstration; verification; certification
while; even though; despite
one day; (on) a certain day
abrupt; sudden; unexpected
to concern; to be related
everything; all; the whole; entirely; completely; wholly