in one's early twenties和in one's late twenties意思是一样的吗?为什么一个是early,一个是late?

in one's early twenties和in one's late twenties意思是一样的吗?为什么一个是early,一个是late? in ones early twenties 与 in ones late twenties 有什么区别?（ones是某某人的意思） in his early 30's our new maths teacher is a woman ( A.in her early 30s B.in her early 30's书上的表达,是in one's early/late 30's,但是.我做了几份试卷答案都是in one's early/late 30s,倒底那个才是正确表达啊. 找错误 what's twenty and twent i's fourty. early morning on new year's day和one night in the winter,这两句话有没有语法错误? in the early 1980s的意思 in one's in one's in one's family in one week’s in one's search in one's be in one's in one's life in one's free In one's own get in one's