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（事件或历史的）遗留问题，后遗症
A legacy of an event or period of history is something which is a direct result of it and which continues to exist after it is over.
例句
...a programme to overcome the legacy of inequality and injustice created by Apartheid...
旨在消除种族隔离政策所遗留的不平等与不公正问题的项目
The old system has left a mixed legacy.
旧制度留下的遗产有好有坏。