It's their knowledge that spells the difference between survival and death for their whole society in a time of crisis caused by rare events for which only the oldest people alive have had experience.
معرفتهم هى الفارق السحري بين الحياة والموت للمجتمع بأسره في وقت الأزمات نتاج أحداث نادرة لم يعشها إلا الأكبر سنا ومروا بخبرتها.