The first-cut model should probably focus on the core functional requirements, with additional use cases added later to support the nonfunctional aspects.
首个模型应该重点关注于核心的功能需求，而后来添加的附加用例则用于支持非功能性的方面。
2
If you don't have a corer, push a paring knife through the apple and cut around the core.
如果你没有去心器，可用水果刀穿过苹果沿核切开。
3
Peel and core the fruit, then cut them into rings, which can either be dried flat or strung on cords.