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Sometimes it 's grandma or grandpa , and other times it 's an ancestor going back several generations .

有的是祖父祖母，有的可能是几代之前的祖先。

But his reluctance is also a question of generations .

但是他的不情愿也是一代人的问题。

Such attitudes consigned whole generations to the scrapheap .

这种态度毁了整整一代人。

Different generations of the same technology cannot communicate .

不同代的相同技术是不能通信的。

Joe fears spending that will burden future generations .

乔担心支出会加重未来几代的压力。