Yóuyǒng dà xiàng xià yòu fēn wéi duō gè xiǎoxiàng.
The swimming category is further divided into many sub-events.
Tips
usage
Sports/admin term: 大项 dàxiàng = 'major event' (sport, e.g. swimming, athletics) vs 小项 xiǎoxiàng = 'sub-event' inside it (e.g. 100 m freestyle). News on the Olympics or National Games (全运会) constantly use this distinction in medal counts.