upgrade
uk
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/ʌpˈgreɪd/us
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/ʌpˈgreɪd/ B2 verb to improve the quality or usefulness of something, such as a machine or a computer program, or give a person a more important job or state that their job is more important than it was in the past: It's very simple to upgrade the indexing software. 升级索引软件很简单。