| 单词 | necessity |
| 释义 | Word Frequency necessity(nɪˈsɛsɪtɪ) nounWord forms: plural -ties 1. (sometimes plural) something needed for a desired result; prerequisite necessities of life 2. a condition or set of circumstances, such as physical laws or social rules, that inevitably requires a certain result it is a matter of necessity to wear formal clothes when meeting the Queen 3. the state or quality of being obligatory or unavoidable 4. urgent requirement, as in an emergency or misfortune in time of necessity we must all work together 5. poverty or want 6. rare compulsion through laws of nature; fate 7. philosophy a. a condition, principle, or conclusion that cannot be otherwise b. the constraining force of physical determinants on all aspects of life Compare freedom (sense 8)8. logic a. the property of being necessary b. a statement asserting that some property is essential or statement is necessarily true c. the operator that indicates that the expression it modifies is true in all possible worlds Usual symbol: □, ∟9. of necessity |
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