复数： grandparents

Kids often get confused by the term grandparent and great-grandparent .

孩子们常常弄不清祖父母和曾祖父母这类称谓。

In some cases , entire families are surviving on the pension of a grandparent .

甚至，有些家庭仅能依靠祖父母的养老金维持生计。

Japan , which has already had lots of practice with older consumers , has developed some ingenious new products for the grandparent generation .

日本在服务老年消费者方面经验丰富，已经为祖母一代开发一些制作精巧的新产品。

It probably would be akin to that of a child and an aunt or uncle , or even a child and a grandparent .

也许会类似于孩子和叔叔阿姨之间的关系，甚至像孩子和祖父母之间的关系。

This could be because they can be more certain than any other grandparent that the child is part of their genetic line , with dna that has not been tainted by affairs , and so worth the investment .

这可能是因为与其他祖父母（外祖父）相比，更确定的是孩子是她们基因链条上的一部分，这部分基因没有被污染，所以值得研究。