求翻译：我的英语老师中等身材，戴着眼镜。。他看上去非常的年轻。我的英语老师有非常深厚的知识。他1997大学毕业。他的知识丰富。上课时讲课生动，活泼。严肃而不失关爱是什么意思？

My English teacher of medium build, wearing glasses. . He looked very young. My English teacher has a very deep knowledge. 1997 he graduated from college. He's knowledgeable. Class lectures vivid and lively. Serious yet caring

My English teacher medium build, wearing glasses. . He looked very young. My English teacher has a very solid foundation of knowledge. He graduated from the University 1997. His wealth of knowledge. classroom lectures vivid, lively. Serious and does not lose his love

My English teacher medium stature, wears the eyeglasses.。He looks at unusual young.My English teacher has the extremely deep knowledge.His 1997 university graduations.His knowledge is rich.Attends class when teaches vividly, lively.Enforces does not lose shows loving concern

My English teacher is of medium build, wearing glasses ... He was so young. My English teacher has a very deep knowledge. He graduated University of 1997. Him knowledge. In class lectures lively and vivid. Serious yet caring

My English teacher medium stature, wears the eyeglasses.。He looks at unusual young.My English teacher has the extremely deep knowledge.His 1997 university graduations.His knowledge is rich.Attends class when teaches vividly, lively.Enforces does not lose shows loving concern