求翻译：1. 具有10年以上的对外汉语教学历史；最近每年学习汉语的外国留学生相对稳定，并具有相当数量；教学类型比较齐全，并具有自身特色；专兼职教师人数同学生人数的比例适当。是什么意思？

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1. Has 10 year above teaching Chinese as a foreign language histories; Recently

1. with more than 10 years of teaching Chinese as a second history, recent relative stability for foreign students to learn Chinese every year, and has a considerable number; teaching type comparison is complete, and has its own characteristics; appropriate proportion of the number with the number o