| 单词 | if and only if |
| 释义 | if and only if WordReference English-Chinese Dictionary © 2019:主要翻译英语中文if and only if conjconjunction: Connects words, clauses, and sentences--for example, "and," "but," "because," "in order that." (on the strict condition that) (强调用语)在…情况下而且只有在此种情况下 zài |
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