俄罗斯的蒲公英和一种生长在美国西南部各州和墨西哥的沙漠灌木的银胶菊是候选品种之一。
Among the candidates are Russian dandelion and guayule, a desert shrub found in the south-western American states and in Mexico.
然而，沙漠植物往往生长缓慢——银胶菊要两年才能成熟。
Desert plants, however, tend to be slow growing-guayule takes two years to mature.
橡胶形成的进化目的，以及橡胶之所以分别出现在橡胶树、银胶菊、蒲公英等各种各样的植物中的原因，在于它能黏住食草昆虫的口器。
The evolutionary purpose of rubber, and the reason why it has appeared independently in plants as diverse as trees, guayule and dandelions, is that it gums up the mouthparts of herbivorous insects.
一种建议是种植银胶菊。银胶菊是一种生长在干旱地区的灌木，它产生的橡胶不含致过敏蛋白，可以用来生产手术手套一类的物件。
One proposal is to use guayule, a shrub that grows in arid regions and produces rubber that is free from allergenic proteins, which makes it useful for items such as surgical gloves.
一种建议是种植银胶菊。银胶菊是一种生长在干旱地区的灌木，它产生的橡胶不含致过敏蛋白，可以用来生产手术手套一类的物件。
One proposal is to use guayule, a shrub that grows in arid regions and produces rubber that is free from allergenic proteins, which makes it useful for items such as surgical gloves.
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