传说时代神农尝百草发现药物，如将单味药视为单方，那么方剂的出现就很早了。

Shennong tasted hundreds of grasses and found herbs during the legend period. The appearance of prescription should be so early if single drug was regarded as single-item recipe.

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表示动作先后的连动式，第一个动词也可以用分词结构来译。 例如： 通过尝百草，神农那时已经开始用单味药来防治疾病。

Tasting the flavors of all kinds of grass, Shen Nong demonstrated that single herb was used to prevent and treat diseases at that time.

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表示动作先后的连动式，第一个动词也可以用分词结构来译。 例如： 通过尝百草，神农那时已经开始用单味药来防治疾病。

Tasting the flavors of all kinds of grass, Shen Nong demonstrated that single herb was used to prevent and treat diseases at that time.

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