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once; one time
I have been to France once.
all at once
He finished all his work all at once.
one defeat
He has a competitive spirit that does not allow even one defeat.
inanimate/non-living/inorganic object/matter
There are only inanimate objects in this room.
a bioweapon, a biological weapon
The use of bioweapons is prohibited by international law.
(marine biology) Synonym of ネクトン (nekuton, “nekton”)
The study of nekton is an important part of marine biology.
biosphere (part of Earth capable of supporting life)
Protecting the biosphere is important for the future of the Earth.
invasive species
Invasive species can have a major impact on the natural environment.
(marine biology) Synonym of プランクトン (purankuton, “plankton”)
In marine biology, plankton is an important part of the marine ecosystem.
biological chemistry
I am majoring in biochemistry at university.
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