bone up on
柯林斯詞典
1. PHRASAL VERB If you bone up on a subject, you try to find out about it or remind yourself what you have already learned about it. 鑽研; 溫習(xí)
I had spent the last few months boning up on neurology. 我前幾個月都在鑽研神經(jīng)病學(xué)。
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