My grandfather might be in his eighties but he is as tough as old boots.

我的祖父虽然已经八十多岁了，但他的身体依然硬朗。

youdao

She's almost 90 but she's still as tough as old boots.

她都快90岁了，可是身体仍然很硬朗。

youdao

This will make it even harder for car designers to persuade those driving electrically to trade in their rustless, tough-as-old-boots vehicles for a new model.

这就使汽车设计商更有底气来说服那些电动力汽车生产商采用他们不锈而且坚固异常的新车身。

youdao

"I rank him alongside Mike Brearley, because they were both charming people on the surface, but underneath they were as tough as old boots, " said Boycott in his Daily Telegraph column.

BBC: Reaction to Vaughan's retirement