先生の口元には微笑の影が見えた。
translation
A smile could be seen on the teacher's lips.
kanji (pronunciations & definitions)
先生: teacher (せんせい), instructor, master, sensei, title or form of address for a teacher, master, doctor, lawyer, etc. | 口元: mouth (くちもと), lips, shape of the mouth, near an entrance, vicinity of an entrance | 微笑: smile (びしょう) | 影: shadow (かげ), silhouette, figure, shape, reflection |