He is much betterhimself since his visit, and seems younger and happier.
自从那次拜访后,他的身体好多了,似乎更年轻、更快乐了。
2
He has never camouflaged his desire to betterhimself.
他从不掩饰自己想不断提升的愿望。
《柯林斯英汉双解大词典》
3
But the Romance Poetry describes a lot of the inner feelings, the motivations, psychology, of a knight trying to improve himself, to betterhimself, so that he's worthy of the love of a woman.