Those goods are available in strong wooden drums of 1,2,5,10 and 20 litres.
這些貨物分別裝入1、2、5、10、20升的木桶里。
and so the tools of long ago have remained when even the bones of the men who made them have disappeared without trace.
因此,盡管制造這些工具的人的骨頭早已蕩然無存,但遠古時代的石頭工具卻保存了下來。