高三学生用英语可以翻译为：

The senior three students

Senior Grade Three students

Senior Three students

Grade Three student

Senior high school student

建议根据具体的语境和需要选择最合适的翻译方式。例如，在正式文件或学术场合中，使用“Senior Three students”或“Senior Grade Three students”可能更为恰当；在日常交流中，“Senior Three students”或“Grade Three student”则更为简洁明了。