The word is "envelope," meaning an envelope, cover, or in specific contexts, a membrane (biology), envelope (astronomy), or envelope (mathematics).
这个单词是 "envelope"，意思是信封、封皮，也可以指生物学中的包膜、天文学中的包层或数学中的包迹。
| 单词 | envelope |
|---|---|
| 发音 | ['envələʊp; 'ɒn-] |
| 释义 | n. 信封，封皮；[生]包膜；[天]包层；[数]包迹 |
| 词序 | 3916 |
Learn with these flashcards. Click next, previous, or up to navigate to more flashcards for this subject.
Next card: Reporting rɪ'pɔːtɪŋ n 报告；报导 3917
Previous card: Clerk klɑːk n 职员，办事员；店员；书记；记帐员 3914
Up to card list: 20000 English words