1. Acrid fumes from burning rubber
    燃烧橡胶的刺鼻浓烟

2. Actually, even with its highest mountains and deepest oceans, the earth is as smooth for its size as a rubber ball.
    实际上，地球上尽管有高耸入云的群山和深不可测的海洋，但是由于本身太大了，所以相比之下，地球仍可以说光滑得像个橡皮球。

3. Rubber is elastic.
    橡皮有弹性.