have been through the mill

• 历尽沧桑；饱尝辛酸；久经磨炼；受过严格的锻炼

have been through the mill的用法和样例：

例句

1. Through the years, the Saxons, Angles and Jutes mixed their different languages.
   历尽沧桑，撒克逊人，盎格鲁人和朱特人混合了他们不同的语言。