Then in 1853 came four American warships under Commodore Perry, and refused to be driven away. 赫伯特·乔治·威尔斯.世界史纲.
The fibrous husks of cocoanuts are prepared in such a way as to form cellulose, which is used for the protection of warships, preventing the inflow of water through shot holes. 佚名.神奇的知识之书.
How are Cocoanuts Used to Help Our Warships? 佚名.神奇的知识之书.