| 词汇 | sine qua non |
| 词根词缀 | 词源： "an indispensible condition," c.1600, from L., lit. "without which not," from sine "without" + qua ablative fem. sing. of qui "which" + non "not." Fem. to agree with implied causa. The L. phrase is common in Scholastic use. Sometimes a masc. form, sine quo non, is used when a person is intended. Proper plural is sine quibus non. |
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