The rubber itself contains and ingredient called antiozonant 橡胶本身的原料叫抗臭氧剂。
2.
That ' s because the antiozonant continually works its way to the outside of the tires every time you drive your car 那是因为抗臭氧剂在其表面持续发生反应的结果。
3.
After the antiozonant works its way to the outside of the tire and is exposed to the ozone in the air , it turns brown 当抗臭氧剂在轮胎上发生化学反应后，它会散发出一种清新的味道，然后会变成谒色。
