Bob: Hi Mary. Are you busy? 嘿,玛丽。你忙吗?
Mary: Hello Bob. Yes, I am. I'm very busy. 你好,鲍勃。是的,我很忙。
Bob: What's this? 这是什么?
Mary: It's a circle. 它是圆形。
Bob: Is this a square? 这是正方形吗?
Mary: Yes, It is. It's a square. 是的,它是一个正方形。
Bob: Is this a triangle? 这是三角形吗?
Mary: No, it isn't. It's a rectangle. 不是,它是一个长方形。
Bob: Thanks Mary! 谢谢,玛丽!
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