here and there; in twos and threes; sporadically; now and then; from time to time; occasionally
to catch sight of; to see; to suppose; to assume from appearances
key word; key phrase; clue; keyword; search term; index term
to taste; to eat; to drink; to speak (of); to put into words; to refer (to)
once; before; formerly; never yet; never before; first time
interesting; fascinating; amusing; funny; enjoyable; fun
restoration to life; coming to life again; reformation; rehabilitation; recycling; reclamation; playback
preservation; conservation; storage; save (to storage)
to erase; to rub out; to turn off (a light, TV, heater, etc.); to switch off; to extinguish (a fire, candle, etc.); to put out; to remove (a smell, pain, etc.)
severe; harsh; hard; cruel; rigorous
environment; surroundings; circumstances
of course; certainly; naturally
network disturbance; communication failure; telecommunication malfunction
engineer; technical expert; technician; craftsperson
to afflict; to torment; to harass; to molest
space station; spaceport; cosmodrome
deterioration; becoming decrepit; becoming worn out
systems engineer; systems engineering; sales engineer; sound effect
company employee; member of a corporation; company stockholder (esp. in legal contexts)
(blue-collar) worker; laborer; labourer
health; healthy; sound; fit
consideration; concern; attention; thoughtfulness; making arrangements; care
full automation; becoming unmanned; making (something) unmanned
to take off; to jump; to take the plunge; to decide; to step out of the ring
remote control; remote operation
from one's home; while sitting at home; without leaving one's house; without moving from one's chair; without taking a step outside
solar system; solar heating system
maintenance; conservatism; conservativeness; conservation
control; management (e.g. of a business)
possible; potential; practicable; feasible
opportunity; chance; trigger; cause
unmanned; uninhabited; unattended; shorthandedness; lack of help
to change; to switch; to change over (to); to renew
reappearance; reemergence; return; reproduction; reenactment; recreation
to perform; to do; to conduct oneself; to carry out
synchronization; synchronized swimming
to be useful; to be helpful; to serve the purpose
technology; engineering; technique; skill; art; craft
establishment; settlement
to be able (to); to be possible (to)
to carry; to transport; to come; to go; to use (a brush, chopsticks, etc.); to move
transport; transportation; conveyance; carriage
to be sufficient; to be enough; to be worth doing; to be worthy of; to do (the job); to serve
link; linking; link; hyperlink; linking (of object files); linkage
termination (of a contract); cancellation; rescinding; lifting (of a ban, sanctions, etc.); removal; release (from obligations)