scum rubber

例句：

1. 1. The new tires are made from scum rubber, which is much more durable than traditional ones.
   新轮胎是由污泥橡胶制成的，比传统的要耐用得多。
2. 2.The car's engine has been replaced with a scum rubber part to improve fuel efficiency.
   汽车的引擎已经被替换为污泥橡胶部件，以提高燃油效率。
3. 3.The construction workers used scum rubber as a temporary surface coating to prevent slipping on the wet ground.
   建筑工人使用污泥橡胶作为临时表面涂层，以防止在湿滑的地面上滑倒。