某些抗生素药物、生物活性物质在水生动物机体中的残留，往往直接影响着人类的健康。
Some antibiotic medicines, residue in aquatic animal's organism of active material of living beings, often influencing the human health directly.
抗生素： 生物体（通常是微生物）产生的对其他微生物有伤害作用的化学物质或代谢产物。
Antibiotic: Chemical substance that in dilute solutions can inhibit the growth of microorganisms or destroy them with little or no harm to the infected host .
本文着重介绍了药用地衣主要的两大类化学物质，即地衣抗生素和地衣多糖类物质的来源、生物活性等，并对地衣化学的发展前景做了展望。
This review covers research into two primary compounds from lichens: antibiotic from lichens and lichenan, and gives a detailed introduction to their bioactivity, origin and value in medicine.
抗肿瘤抗生素是微生物产生的活性物质。
Antitumor antibiotics are tumor-active substances produced by microorganisms.
抗肿瘤抗生素是微生物产生的活性物质。
Antitumor antibiotics are tumor-active substances produced by microorganisms.
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