a shrub(Parthenium argentatum) of the southwest United States and Mexico whose sap was considered a potential source of natural rubber during World War II

 
  • 银胶菊美国西南部和墨西哥的一种灌木(银胶菊属灰白银胶菊),其树液在第二次世界大战期间被认为是天然橡胶的潜在来源
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