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1. species [C] a plant or animal group whose members all have similar general features and are able to produce young plants or animals together

the human species

E.G. a rare tropical species

species of: Over 120 species of birds have been recorded in this National Park.

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2. illegal hunting, extinction, die out

e.g.  Some animals have died out because of illegal hunting.

3. varies across ages, the impact of sth. on sth., have mixed feelings on 

e.g. The impact of computers on communication skills varies across ages and teachers have mixed feelings on the usage of computers.

4. male-dominated world, face barriers to top-level promotion

e.g. Many girls are not willing to seek employment in a male-dominated world.

e.g. Numerous women are unwilling to seek employment in a male-dominated world because they can face barriers to top-level promotion.