A: I hear you are planning to go abroad?
B: Yeah. I'm making preparations.
A: Have you thought it over? It's not easy to live in a strange country.
B: I know. But I want to see more while I'm young.
A: I agree. Going through the mill in one's life is not a bad thing.
go through the mill
变异：be through the mill
exp. To experience a very difficult period in your life with many problems.（经历磨难或痛苦）
e.g. She's been through the mill these last few years — the collapse of her marriage and her career and a serious illness on top of that.
e.g. It's been an incredibly tough tour and we have all been through the mill.
e.g. I went through the mill as a kid in high school.
e.g. He saved up his money so that he might go abroad for his vacation.
e.g. Mark was going for the scholarship in order to go abroad.
2.make a preparation：准备
e.g. Then what should a secretary do to make a preparation for a meeting?
e.g. Driven beyond endurance, they led the villagers to arm themselves and make a preparation for action.
e.g. Think over the matter and then make a decision.
e.g. Elinor was then at liberty to think over the representations of her mother.
e.g. I'll think over your suggestion again.
in a strange country：在异国他乡，在一个陌生的国家