同学你好，该知识点来自沪江网校《2025年11月CATTI笔译二级【签约班】》的课程，想要更系统的学习，欢迎进入课程学习。不仅可以和更多的同学一起学习，而且还有老师、助教随时的学习指导和知识点解答哦。

同学你好~
“Recent years witnessed many advanced and emerging countries with comparatively higher aging population have rolled out...” 句式杂糅，“witness” 已经是谓语动词，后面不能再用 “have rolled out” 这种谓语形式。可改为 “In recent years, many advanced and emerging countries with a comparatively higher - aging population have rolled out...” 。
“Some of these countries have bothered with these issues.” 表达有误，“bother with” 意思是 “为…… 操心；因…… 烦恼” ，这里想表达 “经历波折” ，可改为 “Some of these countries have encountered setbacks in this reform.” 。
希望对同学有帮助~