5.20

1)翻译下面的句子

他和母亲的关系突然变得很僵

The relations between him and his mother have unexpectedly soured.

2)结合自己的工作、学习、生活、兴趣等，想象在什么语境下会用到这个表达。先简要描述这个场景，再造句。

例子:中美之间的关系因为贸易战而变得很糟。

造句:The relationships between China and the U.S. have soured for trade war.