Marine mammal trainer Daniel Ng presents Gracie,a residentSea Cow also knownas Dugong,with a cake covered with sea grass on Tuesday,Jan.13,2009 in Singapore at the Singapore Under water World.是什么意思_Marine mammal trainer Daniel Ng presents Gracie,a residentSea Cow also knownas Dugong,with a cake covered with sea grass on Tuesday,Jan.13,2009 in Singapore at the Singapore Under water World.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句