| 词汇 | bone up on sth |
| 释义 | ● ˌbone ˈup on sth (informal ) to try to learn about sth or to remind yourself of what you already know about it 钻研学习；复习◆ She had boned up on the city's history before the visit . 她在前往这个城市之前先对它的历史研究了一番。See also bone |
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