来自periodic,周期性的。此处形容词作名词，引申词义周刊。

1. She made periodical visits to her dentist.

她定期去看牙医。

来自柯林斯例句

2. The quarterly magazine is a periodical published every three months.

季刊是每3个月出版一次的期刊.

来自《现代汉英综合大词典》

3. They have already put out a new periodical.

他们已经出版了一种新的期刊.

来自《简明英汉词典》

4. It was a periodical commenced by R . Dodsley in 1758.

它是一种期刊,由R?多兹利在1758年创刊.

来自辞典例句

5. She had read of them in a periodical.

她在杂志上看到过.

来自辞典例句