| 单词 | sine qua non | 
| 释义 | sine qua nonnoun  si·ne qua non  ˌsi-ni-ˌkwä-ˈnän   also  ˌsē-;  also  ˌsī-ni-ˌkwā-ˈnän    plural sine qua nons also sine quibus non -ˌkwi-(ˌ)bu̇s-   also  -ˌkwī-   : something absolutely indispensable or essential  reliability is a sine qua non for success sine qua non nounas in mustsomething necessary, indispensable, or unavoidable an extensive grounding in mathematics is a sine qua non for a career in architecture Synonyms & Similar Words Relevance 
 Antonyms & Near Antonyms 
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