If a word is not in the dictionary it gets a red underline, otherwise it's left alone.
如果一个单词是字典中所没有的，那么它的下面将会出现一条红色下划线，相反什么都不会发生。
For instance, the sticky part of the flag can be used to underline the first word.
例如，标记的部分可以用来强调第一个单词。
Suddenly, you're more alert. You watch attentively as your teacher speaks and you underline each and every word that is emphasized or repeated.
突然之间你就警觉了起来，认真听讲，在老师强调重复的词句下划线。
If a word is incorrect and needs to be changed, underline that word and write the correct word after the sentence.
如果是用错字而需要更正的，请在该字下面划线，然后在句尾写上正确的字。
In each word, underline the syllable with primary stress-the syllable that is longer and clearer.
在每个单词中，划出主重音——更长更清楚的音节。
In each word, underline the syllable with primary stress-the syllable that is longer and clearer.
在每个单词中，划出主重音——更长更清楚的音节。
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