1. The retractility of the antenna helped to protect it from damage during strong winds.
（天线的可缩回性有助于在大风天保护它免受损坏。）

2. The retractility of the claws allowed the animal to retract them when not in use, preventing them from getting damaged.
（爪子的可缩回性使得动物在不使用时可以将其缩回，防止受损。）