black to white amplitude range
black to white frequency swing
Proportion of the black balls to the white ones
Artificial black(white) signal
Black-white dairy cattle
black-white discrimination
black-white image grabbing card
call white black、 swear black is white
无线个人局域网(WPAN)
无线个域网(WPAN)
颠倒黑白、颠倒是非、混淆是非