"Be tireless in teaching and graceful in manners" means: be tireless and teach patiently; Appearance image is natural and generous, unconventional. Diligence means: diligence, not slacking off. I have worked tirelessly from Shang, Later Han, Biography of Lu Pi, History of the Three Kingdoms, Shu Shu and Xiang Lang.

Example:

1, the teacher's tireless teaching has benefited me a lot; Under the tireless teaching of the teacher, I have made great progress in my study.

My mother taught me from an early age that I must show my elegance. I have always listened to my mother's tireless teaching.

The teacher always takes pains to teach the students in the class, so all the students in the class are natural and graceful.