brush up on

柯林斯詞典

brush up (also brush up on) (brushing,brushed,brushes)

• 1. PHRASAL VERB If you brush up something or brush up on it, you practise it or improve your knowledge of it. 溫習(xí); 加強(qiáng)…知識

  I had hoped to brush up my Spanish. 我曾希望提高一下我的西班牙語。

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