林青：汉生，这是什么？    汉生：这是我的词典。林青，那是什么？    林青：那是我的电脑。    
Lin Qing: Han Sheng, what's this?
Han Sheng: This is my dictionary. Lin Qing, what's that?
Lin Qing: That's my computer.

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Linqing: Hansheng, what's this?
Hansheng:This is my dictionary. Linqing, what's that?
Linqing: that's my computer. Lesson Content: Linqing: Hansheng, what is (what's) this?
Hansheng: this is my dictionary. Linqing, what is (what's) that?
Linqing: that's (that is) my computer.

• computer [kəm´pju:tə]   n.计算机；电子计算器   (初中英语单词)
• summary [´sʌməri]   a.&n.摘要(的)   (英语四级单词)