1. Anisodactylous birds, such as woodpeckers, have two toes facing forward and two toes facing backward, allowing them to easily cling to tree trunks.
疑难鸟类，比如啄木鸟，它们具有两趾前伸、两趾后伸的不对称爪型，使它们能够轻松地附着在树干上。

2. The anisodactylous foot structure of certain mammals, like raccoons, enables them to grasp objects with great agility.
某些哺乳动物，如浣熊，具有不对称爪型的足结构，使它们能够非常灵活地抓住物体。