be of unknown origin 起源不明
And to be unknown of God is altogether too much privacy.
而作为被神所不认识的存在,是太过私人的存在。
While there are signs that a mushroom is poisonous, they are not consistent, and all mushrooms of unknown origin should be considered dangerous to eat.
尽管有特征说明蘑菇是有毒的,但它们是不一致的,所有来历不明的蘑菇都应该被认为是有危险的食物。
Psychologist Nina Strohminger at the University of Pennsylvania, who was not involved in the study, says she wants the effect to be real but cannot rule out some unknown confounding variable.
没有参与这项研究的宾夕法尼亚大学心理学家尼娜·施特罗明格指出,她希望这种影响是真实的,但不能排除一些未知的混杂变量。
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