"Teacher, you've worked hard."
来源：这是一个常用的表达方式，表示对于老师的辛勤工作表示感谢。
英文例句及中文翻译：
Example 1: "Teacher, you've worked hard today." (老师，您今天辛苦了。)
Example 2: "Thanks for your hard work, teacher." (谢谢您的辛勤工作，老师。)
Example 3: "I appreciate your hard work, teacher." (我感谢您的辛勤工作，老师。)