The natural rubber has been gathered from the sap of plants for centuries.

天然橡胶是几个世纪以来从植物汁液中收集来的。

Natural rubber has problems, though.

然而，天然橡胶也有缺点。

These insulating gloves are made of natural rubber.

这种绝缘手套是由天然橡胶制成的。

Synthetic rubber has substituted natural rubber in many fields.

合成橡胶在许多领域取代了天然橡胶。

Natural rubber has been gathered from the sap of plants for centuries.

从植物汁液中收集天然橡胶已经有几个世纪的历史。