The word is "textbook," meaning a book used as a standard work for a subject of study.
这个单词是 textbook，意思是有“教科书”或“课本”的含义。
| 单词 | textbook |
|---|---|
| 发音 | ['teks(t)bʊk] |
| 释义 | n. 教科书，课本 |
| 词序 | 4523 |
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