A ray of sunshine 用于形容某人或事在艰苦、困难的情况下给他人带来欢乐和希望，就像一缕阳光。

例句

After failing both my exams, going to see my mum has provided a ray of sunshine.

It's been a really terrible few days, but he's been like a ray of sunshine to me.

The new client provided a ray of sunshine for Steve's business on Monday.

请注意

短语 under the sun 字面意思是在太阳底下，比喻世上所有的东西。

例句

Matthew seems to have an opinion on everything under the sun.

You can find almost everything under the sun in that shop.