That's why they were taken on long sea voyages - but they weren't like the biscuits we eat now - they were plain, simple and very hard baked.

这就是为什么它们被带到长途海上航行中 —— 但是它们跟我们今天吃的饼干不一样 —— 它们很普通，简单，而且烤得很硬。

That's why they were taken on long sea voyages – but they weren't like the biscuits we eat now – they were plain, simple and very hard baked.

这就是为什么人们会在远洋航行中带上它们——但它们不像我们现在吃的饼干——它们朴实无华，烤得很硬。