Many natural and semisynthetic variants have since been produced.

许多天然和半合成的青霉素从此也出现了。

youdao

In particular, a semisynthetic medium in the invention is used for to ferment the strain to obtain higher sugar yield.

特别是利用本发明中半合成培养基发酵该菌株可得到较高的产糖量。

youdao

Early antibiotics were natural microbial products, But chemists have modified the structures of many to produce semisynthetic and even wholly synthetic ones.

早期的抗生素是由细菌自然生成的产物，化学家改变许多结构产生出半合成或完全合成的抗生素。

youdao

They successfully designed a semisynthetic version by 1995, gleaning insights into the molecule that would be invaluable in building better ones later.

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