Hit the books 开始学习

Meaning: to study

意义：学习

Example: I can't go out this weekend, I have to hit the books because an exam is coming up.

这个周末我不能出去，因为考试就要来了，我不得不看书。

Piece of cake 小菜一碟

Meaning: something easy

意思是：简单的事情

Example: This test was a piece of cake. I didn't have to study so much!

这次考试是小菜一碟，我用不着学那么多！

Pitch in 努力投入

Meaning: contribute, help out 意思：贡献，帮助

Example: Although Mary was in our group she didn't pitch in with the project.

虽然玛丽在我们组，但她没有参与这个项目。

Ring a bell 听起来熟悉

Meaning: sound familiar

意思：听起来很熟悉

Example: Ben didn't cover all the material for the exam. Most questions didn't ring a bell for him.

本没有看完所有的考试材料，大多数问题他都不熟悉。

Skip class 逃课

Meaning: not go to class

意思是：不去上课

Example: Lee had to go to the doctor's this morning so he skipped class.

李今天早上不得不去看医生，所以他逃课了。

Teacher's pet 宠儿

Meaning: a student who is favored by the teacher

意思是：受老师宠爱的学生

Paul is the teacher's pet as he always polishes the apple.

保罗是老师面前的红人儿，因为他总是拍老师的马屁。

To be under the weather 身体不舒服

Meaning: to fill ill

含义：生病

Example: I'm under the weather. I think I'll skip class.

我不舒服，我想我不能去上课了。

With flying colours 出色完成

Meaning: with distinction, successfully

意义：与众不同，成功

Example: I passed my final exam with flying colours.

我以优异的成绩通过了期末考试。