1. Use your own shorthand and notational system to highlight important facts and actions in the material you're learning. 运用你的速写和笔记系统突出显示你所学材料中的重要事实和行动。
2. Mapping binary + to an analogous operation for a class type can provide a convenient notational shorthand. 将二元+对应到一个类类型的类似操作可提供方便的简写方法。
3. During the medieval period the foundation was laid for the notational practices that would shape western music into what it is today. 整个中世纪时期的音乐理论都建立在记谱法实践的基础之上，这也为当今的西方音乐架构了大概的轮廓。
4. Mapping binary + to an analogous operation for a class type can provide a convenient notational shorthand. 将二元+对应到一个类类型的类似操作可提供方便的简写方法。
5. Including: Locomotor system, alimentary system, respiratory system, urinary system, reproductive system, circulatory system, sense organs, nervous system and endocrine system. 内容包括：运动系统、消化系统、呼吸系统、泌尿系统、生殖系统、脉管系统、感觉器、神经系统、内分泌系统。
