Lingling: Let's print your homework first, Yangyang.

玲玲：让我们先打印你的家庭作业，阳阳。

Yangyang: Thank you! But, wait a minute.Can I print on both sides of the paper, please?

阳阳：谢谢你！但是，等一下。请问我可以在纸的两面都打印吗？

Lingling: OK.I always print that way.

玲玲：好的。我总是那样打印。

Yangyang: It's a good way to save paper, and to save trees.

阳阳：它是一种节约纸张和节约树木的好方法。

Lingling: Yes.Let's live a low-­carbon life.

玲玲：是的。让我们过低碳生活吧。

Yangyang: What does that mean?

阳阳：那是什么意思？

Lingling: Well, for example, don't leave the water running when you're brushing your teeth.

玲玲：嗯，举个例子，当你刷牙的时候，不要让水一直流。

Yangyang: And also remember to turn off the TV when you aren't watching.

阳阳：还有当你不看(电视)的时候，记得关闭电视机。

Lingling: You're right.

玲玲：你是对的。