B
生物医药大词典
by MedSci
菜单
词典
分类
百科
诗词
背单词
英文名
DeepEvidence ↗
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例句 /
An instance of being imperfectly known or difficult to understand.
An instance of being imperfectly known or difficult to understand.
难于理解的不被清楚知晓或难于理解的例子