但是

但是

"但是" means "but" or "however."

In this sentence, '但是' is used to introduce a contrasting statement to what was previously said.

我想去公园，但是今天下雨了。

I want to go to the park, but it's raining today.

Here, '但是' introduces a point of view that moderates or challenges the main point being made.

这是个好主意，但是可能会有些困难实现。

This is a good idea, but it might be a bit challenging to implement.

In this context, '但是' is employed to signal an unexpected outcome or contrast with the subject's effort.

他很努力，但是成绩并没有提高。

He works hard, but his grades haven't improved.