As we learn new information, the brain stores the words, languages and grammatical structures that we use most often in a way that makes them easy to access.

当我们获悉新信息时，大脑把我们使用得最频繁的单词、语言和语法结构按照一种容易访问到的方式来存储。

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Most linguists use changes in words or grammatical structures to try to track language evolution.

大部分语言学家通过单词或者语法结构的改变来追踪语言进化的过程。

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Articles must be at least 400 words in length and well written without grammatical or spelling errors.

文章不能少于400字而且不能有语法错误及拼写错误。

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So, if you want to estimate how many grammatical sentences under twenty words in English, the answer is, "A lot."

如果你想估计一下,用二十个英文单词,可以组成多少个符合语法的句子,答案会是,"很多"

耶鲁公开课 - 心理学导论课程节选

One man with a mental age of nine has a vast memory for foreign words and the use of grammatical endings, but he cannot seem to break free of English word-order.

ECONOMIST: What makes some people learn language after language?