periodical

期刊、杂志

The library keeps back issues of several academic periodicals.

图书馆收藏了好几种学术期刊的过期刊号。

定期的、定期出版的

The department publishes a periodical report on air quality.

该部门会定期发布空气品质报告。

周期性的、间歇性的

These periodical floods have damaged the riverside farmland.

这些周期性的洪水已经毁坏了河边的农地。