他预期最好的药物是一种大蒜提取物，尽管其用于信号干预的主要成分仍然不为所知。
His best bet for a drug lead is an extract of garlic, although the active component that interferes with the signal remains unknown.
作者认为这类生活比起其对立面——在西方被尊崇为“文明社会”的那些更重要，但在国内却常被忽略或不为所知。
This side of life, he argues, was more important than the dissidents, who were lionised in the West as "civil society", but ignored and unknown at home.
然而，糙皮病在当时的美洲几乎还不为人所知，甚至在主要以玉米为生的人之间也是如此。
Pellagra was virtually unknown at that time in the Americas, however, even among people who subsisted primarily on maize.
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