求翻译：作为一名教师拥有渊博的知识是必不可少的。学生是国家未来的栋梁，而他们在教育方面的成长离不开学校教育，离不开老师的教授。教师肩上的担子就是国家的担子，因此要能完成国家赋予的使命，就必须精通他们所教授的科目。是什么意思？

As a teacher has a profound knowledge is essential. Students are the future of our country, and they can not do without the growth in education, school education, without the teacher's professor. The burden of teachers is the country's burden, so to be able to complete the mission entrusted by the s