词典释义：
a small room in which a prisoner is locked up or in which a monk or nun sleeps
单人牢房，（修士、修女睡的）单人小室。
a small compartment in a larger structure such as a honeycomb
（诸如蜂巢等较大结构中的）单元，间隔间。
〈史〉 附属小修道院。
【生】 细胞。
an enclosed cavity in an organism
生物体的小腔。
〈喻〉 政治活动核心小组（通常为颠覆性的秘密组织）
-
the weapons may be used to arm terrorist cells .这些武器可能会被用来武装恐怖分子的核心小组。
the local area covered by one of the short-range transmitters in a cellular telephone system
（移动电话）基站覆盖区。
a device containing electrodes immersed in an electrolyte, used for current-generation or electrolysis
电解电池。
a unit in a device for converting chemical or solar energy into electricity
光电元件。
"Old English, from Old French
