Zhìdìng / zhèngcè / bùnéng / yīchéngbùbiàn / bìxū / yīn / shí / zhì / yí / yīn / dì / zhì / yí制定政策不能一成不变,必须因时制宜、因地制宜。Policies cannot remain unchanged; they must be adapted to the time and place.