中文翻译与英英解释 | very hard unsalted biscuit or bread; a former ship''s staple
同义词：pilot biscuit, pilot bread, sea biscuit, ship biscuit,
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| 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. |
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