adj.平息的；安定的
动词tranquilize的现在分词形式.
He looked at the man with a tranquil eye. 他以平静的眼神看着那个男人。
A gentle breeze wimpled the tranquil lake. 微风在平静的湖面上吹起了涟漪。
There was a tranquil expression on her face. 她脸上露出安详的神情。
A calm or tranquil state of mind; self-possession. 冷静，沉着头脑镇定或沉着的状态; 自我克制
They lived a tranquil life in the countryside. 他们在乡下过着宁静的生活。
