More than 40% of the invasive species had a chemical unknown to native plants; just over 10% of the non-invasive aliens had such a chemical.
More than 40% of the invasive species had a chemical unknown to native plants; just over 10% of the non-invasive aliens had such a chemical.
40%以上的入侵物种含有一种土产植物所没有的化学物质，仅10%多一点的非入侵外来物种含此物质。