occasion可数吗
occasion 的意思是时机、机会，是可数名词。
He has been late on numerous occasions.
他已经迟到过无数次了。
It happened on three separate occasions.
这事在三个不同的场合发生过。
They have been seen together on two separate occasions.
他们有两次被人看见在一起。
I can think of at least three occasions when he arrived late.
我记得他至少迟到过三次。
I only use that on special occasions, so it\'s as good as new.
我只在特殊场合用，所以它完好如新。
On several occasions she had remarked on the boy\'s improvement.
有几次她说起过那个男孩的进步。