presidents
The president of a country that has no king or queen is the person who is the head of state of that country.
leader , head of state , premier , chief , CEO
President Mubarak.
穆巴拉克总统。
The White House says the president would veto the bill.
白宫说,总统将会否决这一法案。 。
The president of an organization is the person who has the highest position in it.
Alexandre de Merode, the president of the medical commission.
医学委员会主席亚历山大·德梅罗德。