详细解释:n. 木制小桶, 容量名
英语解释：
名词 firkin:
a British unit of capacity equal to 9 imperial gallonsa small wooden keg详细解释：
fir.kin
n.（名词）A small wooden barrel or covered vessel.小木桶；密封的容器Any of several British units of capacity, usually equal to about ô of a barrel or 9 gallons (34 liters).英国的一种容量单位，通常等于ô桶或9加仑（合34升）
来源：Middle English ferken, ferdekin 中古英语 ferken, ferdekin probably from Middle Dutch *verdelkijn [diminutive of] veerdel [one-fourth] 可能源自 中古荷兰语 *verdelkijn [] veerdel的小后缀 [四分之一] veerde [fourth] * see k wetwer- veerde [第四] *参见 k wetwer- deel [part] * see dail- deel [部分] *参见 dail-