Airbus recommends rolling takeoffs so If you have a crosswind from the right and you make a right turn onto the runway and apply TOGA power, the fuselage is blocking the airflow to the left engine which could induce a compressor stall at power up so the procedure is calling for the aircraft to be moving forward thus providing a positive flow into the compressor before TOGA power is applied.
This is pretty standard on most planes that I've flown especially the 727 with number 2 engine. You had to get the aircraft rolling with 1 and 3 and then slowly apply number 2 on the roll in a good crosswind scenario ortherwise you could get a compressor stall which always excites the passengers
