brush-up

柯林斯词典

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. 温习; 加强…知识

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

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