加定冠詞the。
n. 主席，會長董事長
The chairman also attended the award ceremony and made an opening statement.
主席也出席了這次頒獎會，還做了開場白。
I was appointed as the chairman of the student union of our school.
我被任命為我們學校學生會的主席。
He has served as the chairman of the College Debate Contest for three years.
他連續三年擔任校園辯論賽主持人。
