| 词汇 | necessary |
| 词根词缀 | 词源： mid-14c. (n.), late 14c. (adj.), from L. necessarius, from necesse "unavoidable, indispensable," originally "no backing away," from ne- "not" + cedere "to withdraw, go away, yield" (see cede). Necessary house "privy" is from c.1600. Related: Necessarily. 词根记忆： a. 必需的,必要的;必然的n.必需品In case of necessity, necessary session can be held on the vessel.必要时,必需的开庭可在船舶上进行. |
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