They both have a long tail, which helps the squirrel to balance when jumping from tree to tree, and the same large eyes, small ears and powerful back legs.

它们都有一条长长的尾巴，帮助松鼠在从一棵树跳到另一棵树时保持平衡，还有同样的大眼睛、小耳朵和有力的后腿。

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The squirrel disappeared into a hollow at the base of the tree.

松鼠钻进了树根处的一个洞。

《牛津词典》

What helps the squirrel to balance when jumping from tree to tree?

松鼠从一棵树跳到另一棵树时，是什么帮助它保持平衡？

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Lucky visitors may even glimpse a flying squirrel leaping from tree to tree.

BBC: Brunei��s wild riches

His Houston socialite lover, Joanne Herring, first made him visit Afghan wounded, implying that helping them was a test of his virility, but Mr Wilson was a pacifist who couldn't bear to shoot a squirrel out of a tree.

ECONOMIST: Charlie Wilson