问题补充：
英语翻译Four years after that,she got another letter,saying that while things had been tough at times,hed stayed in school,had stuck with it,and would soon graduate from college with the highest of honor
答案：
while在这里引导让步状语从句,意思是：尽管.
四年之后,她接到了另外一封信.信上说：尽管一切都不容易,但他还是留在了学校,还是坚持完成学业,而且不久将带着最高荣誉从大学毕业.（麓禾）
======以下答案可供参考======
供参考答案1:
while 这里可以理解成 随着.....、当.....的意思~
供参考答案2:
虽然，尽管，表对比
