在秋天，松鼠们开始忙碌起来，为即将到来的冬季做准备。它们知道，在严寒的冬季，食物会变得稀缺，所以现在就开始储备粮食，以备不时之需。

以下是这段文字的翻译：

Squirrels prepare for winter by stocking up on provisions in autumn. They know that in the severe winter, food will become scarce, so they start storing food now to prepare for the unexpected.