occasional [əˈkeɪʒənl]

以下由轻松背单词网站提供

adj.偶尔的；偶然的；不经常的

not happening or done often or regularly

That sort of thing is quite occasional and not regular. 那种事十分偶然，没有规律。
We must figure in occasional expenses in the budget. 我们必须在预算中把临时费用算计在内。