starting at

n. 起始于

例句与用法：

The film starts at 7.30 and lasts two hours.

影片7点30分开演，演两个小时。

A type of schizophrenia, usually starting at puberty, characterized by foolish mannerisms, senseless laughter, delusions, hallucinations, and regressive behavior.

青春期痴呆一种精神分裂症，通常始发于青春期，其特征为举止痴呆、傻笑、妄想、幻觉以及退化的举止

Stopping and starting at intervals.

断断续续的间隔停歇和启动