赛前他状态很好，赛后就筋疲力尽了。Before the race, he is fine. But afterwards he is worn out.那场展览陈述的想法很好，但是没能实现。The ideas in the show's presentation were good, but failed in execution.你不用担心我。我水性很好。You don't have to worry about ...

“很好”的英语可以翻译为：fine，very good ...