美国食品与药物管理局尚未对银杏制剂和其它保健品进行规范化管理，商标不同，药品的效力和纯度也不一样。

Since the Food and Drug Administration do not regulate ginkgo and other supplements, potency and purity vary from brand to brand.

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美国食品与药物管理局尚未对银杏制剂和其它保健品进行规范化管理，商标不同，药品的效力和纯度也不一样。

Since the Food and Drug Administration do not regulate ginkgo and other supplements, potency and purity vary from brand to brand .

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本文对银杏细胞固定化培养及其次生代谢产物银杏内酯的产生进行了较为系统的研究。

The studies on cell immobilization culture of Ginkgo biloba L, as well as the production of their secondary metabolite -Ginkgolides were reported in this paper.

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