衍生词是词根senior+词缀ity，中文意思是n. 年长，职位高资历，年资
Old age and seniority alone do not command authority among the British: in fact modern life has been developing so fast that old people often appear tiresome and out of date.在英国人当中，年长和资历本身并没有什么权威性：事实上，现代生活发展飞快，老年人常显得乏味又过时。
