space development; space exploration
sometime; someday; one day; some time or other; the other day; in due course
frontier (esp. the American frontier); frontier (of a field); forefront (of science, technology)
loss (of assets, profit, etc.)
optical illusion; hallucination; misapprehension; delusion
fictitious; imaginary; fanciful; aerial; overhead
nothing but; none other than
deflation; contraction; shrinking; constriction
to doubt; to think (something is) doubtful; to wonder; to be suspicious
doubt; suspicion; misgivings; scruples
signboard; sign; draw; attraction; reputation (of a shop); name
far; distant; distant (past); remote (in time); distant (relationship or kinship); having little to do (with someone); far (from something else in quality, degree, etc.)
electricity; (electric) light
being greatly in the red; taking a big loss; heavy deficit
corporate earnings; corporate profits
division; splitting; sharing; distribution; dissemination; allocation
slowly; unhurriedly; easily (e.g. in time); well; well (e.g. sleep); comfortably
pleasant; agreeable; comfortable
to run into; to collide with; to come to the end of (a street); to run into (difficulties, problems, etc.); to run up against
high power; high power output; explosiveness; explosive power; instantaneous force
to miss (doing); to fail (to do)
natural energy (usu. renewable energy)
high-speed; rapid; express; highway; freeway; expressway
transport; transportation
strength; power; proficiency; ability
to make (the best) use of; to put to good use; to let live; to keep alive; to revive; to resuscitate
to escape from; to get out
if so; in that case; in that situation
as is; as it is; as things are; like this; this way; at this rate
struggle (for); scramble; contest
to be unable to; to find difficult (unpleasant, awkward, painful) to do; to serve two or more functions or roles simultaneously; to contain (or combine) two or more features; to work in two or more jobs simultaneously (positions, etc.); to do alongside
ridding oneself; freeing oneself of; growing out of; overcoming; outgrowing