fair

quite good

There’s a fair chance that we might win this time.
这次我们可能胜算很大。

It’s a fair bet that they won’t turn up.
我敢打赌，他们不会露面。

I have a fair idea of what happened.
我相当了解发生的事。

His knowledge of French is only fair.
他的法语知识还算可以。