hit the books 用功
【讲解】
从字面上理解,该习语的意思是“打击书本”，喻指“准备功课，啃书本”，意即“用功”。例如:Jack broke away from his friends, saying “I，ve got to hit the books '.(杰克突然撇下朋友走了, 一面说“我得做功课去了”。）
【对话】
A:Why not go dancing with us?
A:和我们一块去跳舞吧。
B:I'd love to, but I've got to hit the books.
B:我也很想去，可是我还得啃书本。
A:You can study tomorrow.
A:明天再学习吧。
B:No. We'll have a quiz tomorrow.
B:不行，我们明天有个小测验。
