These achievements cannot be gainsaid. 这些成绩是不能一笔抹杀的。
Teachers have expertise that cannot be gainsaid. 教师们都具有无可否认的专业知识。
This cannot well be gainsaid by anybody who does not believe that the world has already attained perfection in all its ways and practices. 谁只要还不相信这世界在一切办法和做法上已臻尽善尽美,谁就不能很好地反驳这一点。