He wrote down a few key words to help him remember what to say.他写下了一些关键词来帮他记住要说些什么。Underline the key words or phrases in the paragraph.用下划线标出这段话的关键词或词组。The key words are underlined.关键的字下面划了线。Underline key words and phrases as you read.阅读时要把关键词和短语划出来。