一 + 系列 + Noun Phrase
The classifier 系列 (xìliè) means 'a series of' or 'a string of' and is used to describe a group of related events, items, or actions. It typically follows 一 and precedes a noun or adjective-noun phrase. For example, 一系列大规模事件 means 'a series of large-scale incidents.'
公司推出了一系列新产品。
Gōngsī tuīchū le yī xìliè xīn chǎnpǐn.
The company launched a series of new products.
最近发生了一系列令人担忧的事件。
Zuìjìn fāshēng le yī xìliè lìng rén dānyōu de shìjiàn.
A series of worrying events have occurred recently.
政府出台了一系列支持小企业的政策。
Zhèngfǔ chūtái le yī xìliè zhīchí xiǎo qǐyè de zhèngcè.
The government introduced a series of policies to support small businesses.