straight-A student 全优生；学霸
Our teacher presented the award to that straight-A student.
老师把奖颁给了那个总考A的学生。
I've been a straight-A student, model employee, and overall law-abiding citizen.
我是个优等生、模范员工和遵纪守法的好公民。

overachiever 优等生
She is an overachiever who plans to attend a top college.
她是优等生，计划考顶尖大学。
I was raised as an overachiever, and I can testify from my own experience that overachieving does not lead to happiness.
我是作为一个优等生长大的，我深切体会到戴着优等生的帽子并不等同于快乐。

underachiever 后进生
While intelligent (with an I.Q. of 116), he was an underachiever who was quick to lose his temper.
尽管聪明（智商116），但是他却是一个老发脾气的后进生。

curve wrecker 学霸
"Curve Wrecker" refers to students who are excellent in their studies with outstanding academic performance.
Curve wrecker 指的是那些学习特别好，成就很优秀的学生。

transcript 成绩单
You must submit your college transcript with your job application.
你需要提交大学成绩单和工作申请。

International Mathematics Olympiad 国际数学奥林匹克；奥数
It was an International Mathematics Olympiad problem. As I took a lot of time to look at the notes, my skills improved dramatically.
那是道奥数题。我花了很多时间看笔记，我自己的技巧也显著提升了。