hardtack是什么意思

中文翻译与英英解释

n.
硬饼干。

very hard unsalted biscuit or bread; a former ship''s staple
同义词：pilot biscuit, pilot bread, sea biscuit, ship biscuit,

a mountain mahogany

Hardtack (or hard tack) is a simple type of cracker or biscuit, made from flour, water, and sometimes salt. Inexpensive and long-lasting, it was and is used for sustenance in the absence of perishable foods, commonly during long sea voyages and military campaigns.