Englishfor English speakers
ecological
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adjective
characterized by the interdependence of living organisms in an environment
an ecological disaster
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adjective
of or relating to the science of ecology
ecological research
security
Noun
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Security is safety.
Traditionally, Japanese workers have had good job security. In fact, they usually had a job for life.
Since the attack, many Americans have lost their feeling of security.
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Security is the people and things that keep you safe.
After the bombing, the airport increased security.
If you see a problem, please call security.