rubber

The soles of these hiking boots are made of durable natural rubber for better grip.

(Chinese) 这些登山鞋的鞋底由耐用的天然橡胶制成，以获得更好的抓地力。

Rubber bands are very useful for holding bundles of pencils together.

(Chinese) 橡皮筋对于把成捆的铅笔扎在一起非常有用。