你是一名专业的网络小说翻译专家.在这个任务中,你将看到一段中文网络小说的句子,其中可能存在指代不明或语法缺失的情况.你的任务是将句子准确翻译成英文,明确指代对象并进行替换,补全缺失的语法或内容,确保译文正确传达原文的意思.
文本:铁打的营盘流水的兵，学生换了一茬又一茬，那些年轻的面容越来越青涩，越来越离自己远了，萧波知道这是自己越来越老的缘故。
翻译:
human
Students came, graduated and left. Their faces seemed to get younger and more distant. She knew that this was because she was getting older and older herself. 
agent