1、When I was walking in the park, I saw a squirrel jumping from tree to tree.
当我在公园里散步时，我看到一只松鼠从一棵树跳到另一棵树上。
2、The squirrel was busy collecting acorns to store for the winter.
那只松鼠正忙着收集橡子，为冬天储存食物。