“变好”的英语可以翻译为：meliorate ...

有时候要到达谷底，才会慢慢变好。Sometimes things have to fall apart to make way for better things.不知怎的，他已经恢复了平静，连心情也变好了。He had recovered his equilibrium and even his good humour, somehow.天气似乎要变好.The weather seems to be perking up....