Before each math class, I see her either helping the class at the front, or bringing the homework of the class together.
每次数学课前,我都看到她要么在前面辅导同学,要么就是在把全班的作业整理在一起。
These Personas are reflected, together with their goals and skills, into a class diagram where each Persona is associated with the System Actors (that is, the user roles) it typically covers.
这些角色,以及其目标和技能映射到类图中,其中每个角色与其覆盖的系统参与者(换句话说,用户角色)相关联。
The StringBuilder class in the System.Text namespace joins strings together without allocating a new string instance each time; this efficiency greatly improves memory utilization.
Text 命名空间中的 StringBuilder 类无须每次分配新的字符串实例即可将字符串连接在一起;这一效率大大改进了内存的利用。
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