合成橡胶在许多领域取代了天然橡胶.

Synthetic rubber has substituted <em>natural</em> <em>rubber</em> in many fields.

用途: 天然橡胶 、 合成橡胶及胶乳的活性剂.

Purposes: <em>natural</em> <em>rubber</em>, synthetic rubber and latex of the active agent.

天然橡胶—一种叫做“乳胶”的白色乳状液体—取自橡胶树。

<em>Natural</em> <em>rubber</em> is obtained from rubber trees as a white, milky liquid known as latex .

通过建立天然橡胶需求函数模型，估算了天然橡胶的需求弹性系数和天然橡胶与合成橡胶的替代弹性系数。

The text calculated the price elasticity of demand of NR (<em>natural</em> <em>rubber</em>) and the cross elasticity of demand of NH and SR by establishing the model of NR's demand function.

分析了天然橡胶改性的技术,并对天然橡胶的改性方法进行了综述.

The article analysizes the technology of <em>natural</em> <em>rubber</em> modification and summarizes the method of its modification.

天然橡胶是如何克服它先前的缺点的?

How is <em>natural</em> <em>rubber</em> treated to overcome its inferior characteristics?

大部分天然橡胶必须从英国和荷兰的联合企业购进.

Most <em>natural</em> <em>rubber</em> must be purchased from British and Dutch combines.

人们通过橡树获取天然橡胶--一种叫“乳胶”的白色乳状液体.

People get <em>natural</em> <em>rubber</em> from rubber trees as a white , milky liquid, which is called latex.

天然橡胶为四大工业原料之一，也是极为重要的战略物资。

<em>Natural</em> <em>rubber</em> is one of the four main rural materials for industry.

解释为什么当天然橡胶在空气中延展开来的时候会硬化?

Suggest why <em>natural</em> <em>rubber</em> readily deteriorates on prolonged exposure to air.