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(单词翻译:双击或拖选)
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You might be checking out this Culips episode because you are brushing up on your English! In this episode we look at three expressions that mean exactly the same thing: to brush up on, to bone up on, to polish up on. These expressions are good to know if you are studying something you already know or refreshing1 some of your old skills.
点击收听单词发音
1 refreshing | |
adj.使精神振作的,使人清爽的,使人喜欢的 | |
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