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标签: gunpowder
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- The Chinese Four Great Inventions （paper making， printing， gunpowder and compass） as well as the skills of silkworm breeding and
- Since niter， the major raw material of the gunpowder， is as white as snow， Arabians called the gunpowder（）and（）.
- The four great inventions in ancient China are compass, gunpowder, papermaking and printing.
- Since niter, the major raw material of the gunpowder, is as white as snow, Arabians called the gunpowder _____ and ______ .