She is two grades ahead of her little brother.

她比她弟弟高两个年级。

His good grades are a pointer of how successful he is in school.

他的好成绩能说明他在学校很优秀。

Elementary school is grades 1 to 6.

小学就是一到六年级。

My grades are slipping this semester; I really need to step it up next semester.

我的成绩这学期下滑了；我下学期真的需要努力。

According to popular lore, Albert Einstein didn't get the best grades as a kid.

据传，爱因斯坦小时候学习成绩并不是最好的。

Getting good grades depends on how much you study.

能不能取得好成绩，取决于你学习的程度。

Her family was proud of her outstanding academic grades on top of her superior athletic abilities.

她的家庭对于她接触的学术表现的骄傲甚于她的优秀运动技巧。

I was able to get good grades last semester.

我上个学期的成绩很好。

She has. She's also been really secretive and her grades have been slipping a lot too.

是的，而且还搞得神神秘秘的，成绩也下滑了很多。

She earned her grades through sheer hard work.

她的学习成绩完全是靠刻苦用功得来的。

Some 20 percent of grades are awarded for coursework.

课程作业占分数的20%左右。

The average price for all grades of petrol at the pump was $3.49 a gallon.

加油泵所有等级的汽油平均价格为1加仑3.49美元。

Be aware of the terrible strain it can put on a child when you expect the best grades.

当你期盼最佳成绩时，要意识到这可能给孩子带来的可怕压力。

I forgot all about the ring. Which just goes to show that getting good grades in school doesn't mean you're clever.

我完全忘了戒指的事情。这证明在校取得好成绩并不意味着你就聪明。