‘详实’ is an adjective meaning 'accurate and detailed'. It combines two characters: 详 (xiáng), meaning 'detailed', 'thorough', or 'comprehensive', and 实 (shí), meaning 'real', 'true', or 'substantial'. Together, they emphasize both factual accuracy and rich, concrete detail — not just long descriptions, but ones grounded in truth and evidence.

This word is commonly used in formal or written contexts such as academic writing, news reporting, historical accounts, official documentation, and research summaries. It often modifies nouns like 报告 (report), 记录 (record), 描述 (description), or 资料 (information). While it can appear in speech, it sounds more polished and precise than everyday alternatives like 详细 (detailed) alone — suggesting reliability and careful verification.