形象大使

tā yìng yāo dān rèn lùn tán de xíng xiàng dà shǐ

他应邀担任论坛的形象大使。

He is invited to take on the role of promotion ambassador for the forum.

zhì yuàn zhě shì xiàn dài ào lín pǐ kè yùn dòng de jī shí shì ào yùn huì de xíng xiàng dà shǐ

志愿者是现代奥林匹克运动的基石，是奥运会的形象大使。

Volunteers are the footstone of Olympic Games and the real image ambassador of olympics, representing Olympic spirit.