They acquire the spoken form of their mother tongue during the formative period of language acquisition.

在语言习得的形成阶段，他们会自然习得母语的口语。

Again, the problem here is much less difficult in the written rather than the spoken form.

同样，这里的问题在书面形式上比在口头形式上要容易得多。

Word is a unit of expression that native speakers may recognize by intuition, whether in spoken or written form.

词是个语言表达单位，无论是在口语还是在书面语中，说母语的人都能够凭直觉识别这个语言单位。

If a group of teenagers, for example, were just speaking a degraded or sloppy form of English, then it should be easy for an adult to imitate.

例如，如果一群青少年只是在说一种低级或草率的英语，那么成年人应该很容易模仿。

Look up the pronunciation of new vocabulary and this will help you recognize the spoken form of the word during the lecture. Ask the lecture is you may audiotape the lecture.

查找新词汇的发音，这将帮助您在讲座中识别单词的口语形式。询问讲座是您可以对讲座进行录音。