independence; self-reliance; independence (e.g. of a nation); freedom; separation; isolation
efforts; exertion; endeavour; assistance; services
prior; beforehand; in advance; before the fact; ex ante
study; research; investigation
duration; continuance; survival; persistence; retention
chief; main; principal; major
subject; theme; homework; assignment; task; challenge
government service; the bureaucracy
mixed (e.g. team, chorus)
minute; detailed; careful; scrupulous; thorough
examination; exam; test; trial; experiment; test
area of expertise; (one's) field; (one's) line
research establishment; research institute; laboratory
tropical forest; tropical rainforest
Antarctic Circle; the Antarctic
throwing in; inserting; investment; commitment (of funds, personnel, etc.); launching (a product into the market); introduction
logistical support; combat service support
armoring; armouring; armor; armour
to engage in; to participate in; to take part in; to be involved in
up to now; so far; traditional; conventional; usual
lethality; killing effectiveness
new type; new style; new model; new strain (e.g. infectious disease)
gas (state of matter, e.g. poison gas, natural gas); gasoline; gas; dense fog; thick fog; gas stove
continent; continental Asia (esp. mainland China); continental Europe
extinction; annihilation; destruction
poisonous substance; toxic substance; poison
pathogenic bacteria; germ; pathogen
cultivation; nurture; culture
underground; subterranean
vehicle; conveyance; transport; ride (playground, fair, carnival); playground facility