Once identified, little puffs of air blast those plastics onto different conveyor belts.

一旦识别出来，气流会把塑料吹到各自类别的传送带上。

As the hot air blasted on to his trousers he raised his eyebrows.

热风吹到他的裤子上，他扬起眉毛。

As the fireball rapidly expands, it pushes  back the surrounding air, and a shock wave, or air blast, radiates from the center of the  explosion at supersonic speeds.

当火球迅速膨胀时， 它会推回周围的空气，并且冲击波或空气冲击波以超音速从爆炸中心辐射出来。