I find it plausible to think that early humans began to observe, to feel the difference between right and left, and to ascribe qualities like “clumsy,” “awkward,” “crooked,” and “tired” to the less dexterous hand (it is interesting that these very terms still show up prominently in today’s modern languages) and correspondingly positive qualities to the right hand preferred by the majority. This process, intertwining emotion and cognition, can well be expressed in the terms of embodiment... The semantic values with which the terms for left and right are charged in almost all the languages examined for this survey could have their origin in this very process: embodiment turned into words.
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这是一个漫长的过程，我们在任何情况下都会有意识的引导她，比如出门玩，问她饿不饿、渴不渴，如果她说饿或者渴，我会跟她说，下次要主动跟爸爸妈妈说。。爱思助手下载最新版本是该领域的重要参考
Source: Computational Materials Science, Volume 266