In the Book of Deuteronomy, Moses spoke to the people, saying, "be on your guard and be very careful not to forget the things your own eyes have seen, nor let them slip from your heart as long as you live, but make them known to your children and to your children’s children"(4.9).

Dalili da aka ba aka ba da sassan yankunan da suka dace wanda masu sayarwa za su iya amfani da su don gudanar da bincike da gwada gwagwarmayar fasahar su da kuma inganta sakon su don sake tabbatar da masu amfani.
