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People get natural rubber from rubber trees / as a white, milky2 liquid,which is called latex. / They mix it with acid, and dry it, / and then they send it to countries all over the world. / They started rubber plantations3 in countries / with hot, wet weather conditions, / but these still could not give enough raw rubber / to meet the needs of growing industry. / It was always possible that wars or shipping4 trouble could stop supplies. / In the end, they found a way of making artificial, man-made rubber / which is in many ways better than / and in some ways not as good as natural rubber. / It is usually cheaper than natural rubber. / Today, the world needs so much rubber that / we use both natural and artificial rubber in large amounts. /
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1
synthetic
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adj.合成的,人工的;综合的;n.人工制品 | |
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2
milky
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adj.牛奶的,多奶的;乳白色的 | |
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3
plantations
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n.种植园,大农场( plantation的名词复数 ) | |
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4
shipping
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n.船运(发货,运输,乘船) | |
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