He used his computer to make a collage of pictures superimposed on a map.

他用自己的电脑将地图上的多层图片做成了一张拼图。

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But a lot of activities, such as chaperoning school field trips, helping a sick child make a collage, reading to older people who have lost their eyesight or participating in an AIDS walk with friends, can be lots of fun.

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