To say that we must have general concepts in order for empirical knowledge to be possible is just to say that we must have such recognitional abilities as these. 说我们必须拥有某些使得经验知识成为可能的一般概念，只是说我们必须有如此这般的认识能力。
POS tagset selection in the past was mainly done by experts using human knowledge manually,since there is no automatic or semi-automatic way to assist the selection process. 过去词类标记集的选择主要基于专家的经验知识，缺乏自动或半自动的方法来辅助这一过程。
