该大黄类植物(Rheum palaestinum)却采取了完全不同的另外一种方式：巨大的叶子将水分引导到独根里面。
The rhubarb plant (Rheum palaestinum), however, takes an entirely different approach: its huge leaves funnel water to its single root.
他给了我一根大黄瓜。
方法采用高效液相色谱法，测定其根中各个部位的大黄素和大黄酚的含量。
MethodsThe content of emodin and chrysophanol in the parts of root were determined by HPLC.
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