to defend or keep a principle or law , or to state that a decision which has already been made, especially a legal one, is correct
发音
例句
1. We will loyally uphold the principles of the United Nations. 我们将忠实地维护联合国的原则。 2. It's up to the government to uphold the rights of individual citizens. 政府有责任维护各个公民的权利。