A computer virus may lurk unseen in a computer's memory, calling up and infecting each of the machine's data files in turn.计算机病毒可潜伏在计算机存储器中，依次调出并感染计算机中的每一个数据文档。My computer is slow because it needs more RAM.我的电脑运行速度慢，它需要容量更大的随机存取存储器。All the storage units were filled to capacity.所有的存储器都装得满满的。