ambassador
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/æmˈbæsədər/
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/æmˈbæsədə(r)/
a person sent by their country to live in another country and represent it
The ambassador from France met with the president to discuss important matters.
法國大使與總統會面討論重要事宜。
someone who represents or supports something
She is a great ambassador for our charity because she cares so much about helping others.
她是我們慈善機構的傑出代表,因為她非常關心幫助他人。