高考复读的英文翻译是 "repeat a year of high school" 或者 "go back to high school for another year of study"。

详细解释如下：

1. "repeat a year of high school" 表达的是重新读一年高中的意思，符合高考复读的情境。

2. "go back to high school for another year of study" 也是指回到高中再上一年高三，表达的意思与高考复读相同。

因此，高考复读可以翻译为 "repeat a year of high school" 或 "go back to high school for another year of study"。