presiding officer
noun [ C ] uk/prɪˌzaɪ.dɪŋ ˈɒf.ɪ.sər/ us/prɪˌzaɪ.dɪŋ ˈɑː.fɪ.sɚ/
（选举投票处的）监票官
(in the UK) the person who is in charge of a polling station (= a place where people go to vote in an election)
Presiding Officer （苏格兰和威尔士的）议会主席
the person who controls the business of the Scottish Parliament and the National Assembly for Wales, by deciding who can speak, keeping order, etc.
Compare: Speaker