PB

英文释义

n a soft heavy toxic malleable metallic element; bluish white when freshly cut but tarnishes readily to dull grey
n a unit of information equal to 1000 terabits or 10^15 bits
n a unit of information equal to 1000 terabytes or 10^15 bytes
n a unit of information equal to 1024 tebibytes or 2^50 bytes