learning unit的用法和樣例：
例句
- Service learning subjects incorporate a community service project into the academic learning experience.
服務性的學習單元結合一個社區服務計畫與學術研究計畫，累積研究經驗。 - Each unit of study will consist of a series of short composition projects using specific types of hardware and software in clearly delineated ways.
每一個學習單元，將包含一連串使用簡單明確的特定硬體或軟體，創作小型作品組成。
