每个参加董事会的人都处于极度集中的状态，尽量使自己看起来很聪明。
Everyone attending the board meeting was in a state of intense concentration, trying to look as intelligent as they could.
这将缓解边界的压力，使执法工作集中于对付图谋危害我们的人。
This will take pressure off the border and allow law enforcement to concentrate on those who mean us harm.
在发达国家，人们往往住在城市和郊区，使这些区域的人口相对集中。
In developed nations, people tend to cluster in cities and suburbs, concentrating pollution in those areas.
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