“八十岁”用英语怎么说

我们全家和所有的亲戚都来参加祖父的八十岁寿宴.All our family came to our grandfather's eightieth birthday party.他虽有八十岁了, 但仍然充满了活力.Although he is eighty, he is still very much alive.他祖父现在一定快八十岁了.His grandfather must now be getting on for e...