presiding
v. 主持（会议等）；担任（会议）主席；负责（preside 的现在分词）
例句
Mercury was the presiding divinity over commerce.
墨丘利是商业之神。
《新英汉大辞典》
The third arbitrator shall be the presiding arbitrator.
第三名仲裁员是首席仲裁员。
Hanna didn't understand what the presiding judge was getting at.
汉娜并不明白首席法官指的是什么。
