高三

高三

"高三" means "third year of senior high school."

Here, '高三' is used as a specific term referring to the third year (senior year) in a typical Chinese high school curriculum, demonstrating its academic usage.

我哥哥现在是高三学生，准备高考。

My older brother is currently a senior in high school, preparing for the college entrance examination.

In this sentence, '高三' again refers to the senior year of high school, emphasizing its connection with a period of intensive study and preparation.

高三学生的生活常常很忙，复习功课是首要任务。

The lives of senior high school students are often very busy, as reviewing lessons is the primary task.

Here, '高中三年' uses '高三' in a broader context, referring to the entire duration of high school years collectively rather than specifying the senior year.

高中三年的时光总是转瞬即逝，要珍惜每一天。

The three years of high school always pass by quickly; cherish every day.