20150819 【每日口說綀習】(predator)

For example,
a fear reaction leads to a response of
, say,
running away from a predator that in turn,
ensures your survival.
Hopefully.

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reaction
What was his reaction to the plan?
Putting an acid and a metal together causes a reaction.

response
He made no response to my question.
She laughed in response to his jokes.

predator  食肉動物；掠奪者

survival
The old man is the survival of the past age.