in和within的区别Scientists say Parkin's new computer memory could begin to replace flash memory (in) three to five years括号的in可以用within替换吗,为什么
问题描述：
in和within的区别
Scientists say Parkin's new computer memory could begin to replace flash memory (in) three to five years括号的in可以用within替换吗,为什么
答
一段时间觉得还是得用in,不能用within,还要看一下原文的意思,这2个词的确不好分表达时间,这两个介词有着这样一个区别：前者是指期限之外,而后者则是指期限之内；而且由后者引导的短语总是用于一般将来时态,而前者无...