| 词汇 | brush sth up/brush up on sth |
| 释义 | brush sth up/brush up on sth to study or practise sth in order to get back knowledge or skill that you had before and have lost 重温荒疏了的知识或技术: ◇she took a course to brush up her spanish. 她为了复习西班牙语，选读了一门课程。 |
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