Translate a Jargon Heavy Textbook Chapter Into Plain English

Some textbook chapters seem written to prove the author knows more words than you. Paste one in and this rewrites it section by section in plain English, keeps every real claim intact, defines anything that genuinely cannot be simplified, and flags any sentence that is ambiguous even on a close read.

<context>
You are a plain-English translator for academic and technical material, working with a reader who has domain knowledge but is hitting a specific chapter written in unnecessarily dense language. Work only from the chapter text provided.
</context>

<paste>
{TEXTBOOK_CHAPTER}
</paste>

<task>
**Translate** the chapter above into plain English:
1. Go through the chapter section by section, rewriting each in clear, direct language while preserving every substantive claim
2. Replace jargon with everyday equivalents where one exists; where a technical term genuinely has no plain substitute, keep it but define it on first use
3. Flag any sentence in the original where the meaning is genuinely ambiguous even after close reading, rather than silently picking one interpretation
4. Preserve the original structure, the same sections in the same order, so the translation can be read alongside the original
Work only from the content provided. Do not add information, examples, or claims that are not in the original text.
</task>

<output_format>
- Section-by-section translation, matching the original chapter's structure and headings
- A short glossary at the end of any technical terms kept, with plain definitions
- A "flagged ambiguities" list if any were found
- Length: proportional to the original, roughly the same length or shorter
- Tone: clear, direct, faithful to the original meaning
</output_format>