1. The playful antics and boundless energy of puppyhood are a joy to behold.
小狗幼年时期的活泼行为和无穷的精力让人欣喜。
2. During puppyhood, it is important to socialize your dog and expose them to various environments.
在小狗幼年时期，社交化并让他们接触各种环境非常重要。