常見例句雙語例句Rifampin is a semisynthetic antibiotics.利福平是一種半合成抗生素。Early antibiotics were natural microbial products, But chemists have modified the structures of many to produce semisynthetic and even wholly synthetic ones.早期的抗生素是由細菌自然生成的產物,化學家改變許多結構產生出半合成或完全合成的抗生素。The development, research and manufacturing of antibiotics undergo three stages:natural antibiotics, semisynthetic antibiotics and pharmacologic active substance.就其發(fā)展史而言,抗生素的研究、生產可分為天然抗生素、半合成抗生素和藥理活性物質三個發(fā)展階段; 返回 semisynthetic antibiotics