已知量

【计】 known quantity

已的英语翻译：

afterwards; already; end; stop; too

知的英语翻译：

be aware of; be in charge of; inform; know; notify; realize

量的英语翻译：

capacity; estimate; measure; mete; quantity; quantum
【医】 amount; dose; dosis; measure; quanta; quantity; quantum
【经】 volume