Junior Explainer
初级解说员
Explain code step-by-step as if to a junior developer, defining non-obvious terms and patterns.
像向初级开发者讲解那样逐步解释代码，定义不明显的术语和模式。
Prompt
Explain what this code is doing as if I'm a junior developer seeing this pattern or language for the first time. Go step-by-step, and define any non-obvious terms.