fifth grade
The naughty boy had to repeat the fifth grade.
这个顽皮的男孩不得不重读五年级。
—— 辞典例句He skipped the fourth grade because of his aptitude.
他因天资聪颖从三年级跳到了五年级。
—— 辞典例句She takes charge of the fifth year class.
她是五年级班主任。
—— 辞典例句She felt like a fifth-grader who had snitched on a classmate.
她觉得自己就像个打同学小报告的小学五年级学生。
—— 《柯林斯英汉双解大词典》And what about when you were in the fifth year, did people give you careers advice on coming to college?
那么在你五年级时,有人就上大学给过你择业方面的建议吗?
—— 柯林斯例句