foreign matter; impurities
machine; mechanism; instrument; appliance; apparatus
discovery; detection; finding
by-product; spin-off; outgrowth; side effect
to stay indoors; to be confined indoors
uninterested; unconcerned; plain; light; flowing gently
to untie; to unfasten; to unsew; to unstitch; to solve; to work out; to dispel (misunderstanding, etc.)
it's OK to ...; it's best to ...; it's alright to ...
to unite; to join; to do together; to confuse with
harmonious; peaceful; happy; amicable; smooth; free from trouble
good thing; nice thing; good excuse; good grounds; interjection used to impress an idea or to urge a response
entirely; completely; all; nothing but
to choose one's words (with care); to be careful with one's words
to build up; to establish (one's reputation)
system; organization; organisation; architecture
making efficient; optimization
leaving out; omitting; skipping; (beating) in succession; in a row
study; learning; tutorial
establishment; settlement
to disperse; to take a castle
one or two; a few; small number
creation; Creation (by God)
to be sufficient; to be enough; to be worth doing; to be worthy of; to do (the job); to serve
correspondence (to); equivalence; suitability; coordination; dealing with; coping with
in the twinkling of an eye; in a flash
weapon; arms; ordnance; weapon (something used to gain an advantage); asset
jump; jumping event (skiing, track and field); jumping (to another page after clicking a hyperlink); jump (in price); sudden rise
cartoon; comic; comic strip; manga
protagonist; main character; hero(ine) (of a story); head of household
IT revolution; information revolution
information technology; IT
adaptation; accommodation; conformity
birth and growth; giving birth and raising; development; breeding
show (of power, ability, etc.); exhibition; demonstration; display; manifestation
to spout out; to spurt out; to sprout; to bud; to burst into laughter; to blow (smoke, etc.)
present point (i.e. in history); at the present time