Crux is a noun meaning the essential point, core, difficulty, or cross shape. This flashcard teaches the meaning of this noun.
crux是名词，意为症结、关键、难题或十字架形。此闪卡教授了该名词的含义。
| 正面 | crux |
|---|---|
| 背面 | n. 症结；关键；难题；十字架形，坩埚 |
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