是可数名词，其复数形式是diaries，例如：
1.It was later discovered that the diaries were a fraud.后来查明这些日记是伪造的。
2.The diaries are a mixture of confession, work in progress and observation.这些日记里既有自白，也有当下工作记录，还有见闻评论。
3.He prefaced the diaries with a short account of how they were discovered.他在前言中简要叙述了日记发现的经过。
