dark (color); concentrated; thick
to that extent; to that degree; so much; so
new development; new discovery
indicates reason or excuse; indicates dissatisfaction; indicates desire to be pampered or indulged
those (near the second person)
operation (of machine); operating; running; working
to miss (doing); to fail (to do)
fellow; mutual; companion; comrade
to spend; to expend; to waste; to squander; to devote
opaque; obscure; opacity; obscurity; unclear; unpredictable
means of transportation; means of transport
people; men and women; each person; everybody
to sniff out; to get wind of
exchange (e.g. cultural); interchange; interaction; alternating current; AC
price; cost; charge; consideration (in a contract)
exchange; interchange; switching; reciprocity; barter; substitution
majority; more than half; most (of); mostly; largely; mainly
trade; business; commerce; occupation; calling; profession
to change; to alter; to transform; to reform; to revise; to amend
individual; private person; personal; private
to be rich in; to abound in; to be abundant in; to be rich; to be wealthy
important; significant; precious; valuable; careful
in the first place; to begin with; after all; anyway; beginning; start
may; might; perhaps; may be; possibly
when it comes to ...; where ... is concerned; if it's the case that ...; if it turns out that ...; if it's true that ...
development; exploitation
to stream; to flow (liquid, time, etc.); to be washed away; to be carried; to drift; to float (e.g. clouds); to sweep (e.g. rumour, fire)
completely; thoroughly; horribly; without exception; until there's no untouched (undamaged) part
to destroy; to overthrow; to wreck; to ruin
stipulation; stating clearly; documenting in writing; stating explicitly
(a) step; one step; level; stage; small degree; small amount
to make a mistake (in); to commit an error (e.g. in calculation); to confuse; to mistake something for something else
quite capable of ...; could happen; not unlikely to
as expected; sure enough; after all (is said and done); in the end; too; also
substance; real form; main part; main unit; this machine; this appliance; object of worship (at a shrine, temple, etc.)
very; greatly; immense; enormous; serious; grave
not quite (right); not very good; somewhat (lacking)
image (in one's mind); impression; (computer) image; depiction (e.g. of a product); rendition
to come together; to merge; to fit; to match; to be profitable; to be equitable