historical period的用法和样例：
例句
- The Indo-European language of the Greeks. Greek, the sole member of the Hellenic branch, consists of several groups of ancient and modern regional, social, and literary dialects and is divided into several historical periods.
希腊语印欧语系的希腊语，作为希腊语族的唯一成员，含有几组地方、社会和文学方面的古方言和现今方言，并被分为几个历史时期
