sit on something
phrasal verb with sit verb uk/sɪt/ us/sɪt/ sitting | sat
informal
(DELAY)
拖延，延迟
to delay taking action about something
The company has been sitting on my letter for weeks without dealing with my complaint. 公司将我的信搁置了数周，没有处理我的投诉。
(KEEP SECRET)
mainly disapproving对…保密，不让别人知道…
to prevent people from knowing a piece of information
The city council will presumably sit on the report until after the election. 市政府大概在选举前不想公布这份报告的内容。