v. 主持；就任要职；入座（chair的过去式和过去分词）

Chair \Chair\, v. t. [imp. & p. p. {Chaired}; p. pr. & vb. n.
{Chairing}.]
1. To place in a chair.

2. To carry publicly in a chair in triumph. [Eng.]

3. To function as chairperson of (a meeting, committee,
etc.); as, he chaired the meeting.
[PJC]