For decades, researchers have argued about whether corn was a dietary staple in the late Archaic.

几十年来，研究人员一直在争论玉米是否是太古时期餐桌上的主食？

Bread and ale were still  dietary staples for most people.

面包和啤酒仍然是大多数人的主食。

Deprived of  dietary staples such as milk meant that cases of rickets and other diet-related illnesses rose.

被剥夺了牛奶等主食意味着佝偻病和其他与饮食有关的疾病病例增加。