大四的英文：
senior

参考例句：

He is four years my elder.
他比我大四岁。

We have to write a discourse in the last year of college.
我们在大四的时候要写论文。

In his senior year, he rejected a job offer from Microsoft and opted for the physics graduate program at harvard
在大四时他拒绝了微软公司的聘用而选择了去哈佛读物理专业的研究生。

senior是什么意思：
adj. 较年长的；较高的；资历较深的
n. 较年长的人；高年级学生；上司

He is senior to me.
他的职位比我高。

The interests of seniors tend to be . . . varied
老年人的兴趣倾向于…多彩的。

Senior prom, do you have the fever?
毕业生舞会，你有兴趣吗？

Seniors and moms flocked to their booth.
老年人和母亲们蜂拥来到他们的摊位。

There are separate rooms for senior and junior officers.
高级军官和下级军官的房间是分着的.