That means a prehistoric fruitarian diet would be more like a modern-day vegetable diet.

这意味着史前的水果饮食和现在的蔬菜饮食差不多。

Their summer food is mostly earth-worms, but in winter they are driven to vegetable diet.

他们夏天的食物主要是地上的虫子，但是在冬天却被迫吃素。