【机】 exchange velocity
exchange; interchange; change for; commute; permutation; reciprocation
replacement
【计】 exchange; swap; swapping; switching; transput; X
【医】 chiasmapy; cross-over; crossing-over
【经】 interchange; swap
career; pace; quickness; rapidity; rate; speed; velocity
【化】 velocity
【医】 rate; speed; velocity