single head of state个人元首
supreme head of state国家最高元首
unitary head of state个体元首
Author believe that the chairman of PRC is head of state.
通过分析，本文认为，我国国家主席就是国家元首。
参考来源 - 功能视角下的国家元首职权N-COUNT（可数名词） A head of state is the leader of a country, for example a president, king, or queen. 国家首脑
The Algerian authorities have still not named a new head of state.
阿尔及利亚当局尚未任命新一任国家首脑。