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What is the most immediate danger of heroin use?
Oscillate
To move or swing back and forth at a regular speed, or to vary between opposing beliefs, feelings, or theories.
Density-dependent Factor
A factor whose effects on the size or growth of the population vary with the population density, such as disease or food supply.
Population Size
The number of individuals belonging to a specific species that live in a designated area.
Carrying Capacity
The maximum population size of a species that the environment can sustain indefinitely, given the food, habitat, water, and other necessities available in the environment.
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