principal character的用法和樣例：
例句
- It introduces its definition, seedtime, character, and analyzes the development and status of our country.
介紹了物流的定義和現代物流管理的發展階段和功能要素及主要特征，并分析了我國物流的發展歷程和現狀。 - Carl, the main character, will have to consume food on his journey across San Andreas, and will gain weight if he eats too much.
卡爾，其主要特征，消耗糧食行程橫跨圣安德列斯，并會增加體重，如果他吃太多。
