circumstances还是circumstance?

circumstances还是circumstance? circumstance和circumstances如何使用 circumstance Under no circumstances would i tell a lie .circumstance 为什么加 What circumstance? we are in the same circumstance还是we are in the same circumst CIRCUMSTANCE是切莫意思 condition,circumstance,situation区别? circumstance和environment区别 attending circumstance什么意思 circumstance的用法 What circumstance是什么意思