植物至少有两个学名———一个属名，是总称，用大写，另一个是小写字母的种名，更加专属，比如，洋姜jerusalem artichoke就是向日葵属菊芋helianthus tuberosus。
Plants have at least two names - a genus name, which is general and capitalised, and a lower-case species name that is more specific, for example, the Jerusalem artichoke is Helianthus tuberosus.
本论文对向日葵根中化学成分进行了深入研究，并对向日葵属植物的化学成分、生物活性和药理作用做了简要综述。
In these paper, the chemical constituents in the root of sunflower were studied further, the progress in chemical compositions and pharmacological research were overviewed.
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