英语词汇“usnic acid”是什么意思，“usnic acid”的读音、用法及例句翻译-烛光网

词汇	usnic acid
释义	us·nic acid AHD[ŭsʹnĭk] D.J.[ˈʌsnɪk]K.K.[ˈʌsnɪk]n.（名词） An antibacterial substance, C₁₈H ₁₆O ₇, obtained from lichens of the genus Usnea, especially U. barbata. 地衣酸：一种抗菌素，C₁₈H ₁₆O ₇，从松萝属地衣中获得，尤其是光滑松萝
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