以下为句子列表：
英文: Experts may not know the specific chemical components of the herb that make it effective, but valerenic acids have been previously associated with good quality valerian, according to the ConsumerLab report.
中文: 据这个消费者网站报告，专家们可能并不了解使草药有效的特定化学元素，但含有谷类酸的草本植物早已被证明具有较高质量的镇静效果。
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