开放日参观 meaning in Chinese
open-day visits
Examples
- A special exhibition explaining the work of the hong kong observatory will be staged for the visitors
市民可在开放日参观特设的展品，了解天文台的工作。 - A record breaking 15 , 000 people visited the hong kong observatory during its open day on 20 and 21 march 2004
破纪录的一万五千人在3月20及21日一连两天的天文台开放日参观天文台。