Western Digital,a leading maker of computer hard drives agreed to buy SanDisk,which makes "flash" memory chips used in snartphones and tablets,for $19 billion in cash and shares.Western Digital's sales fell last year,reflecting the shift to mobile computing;SanDisk has also stumbled stumbled lately,making it a takeover target as the chip industry consolidates.
flash memory:闪存
mobile computing:移动计算
stumble:发展不顺
takeover target:收购标的
chip:芯片
consolidate:整合