科研之友
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<正>The weather is nice. It’s time for camping. It’s popular in the US! People go out to enjoy nature(自然). They bring a tent(帐篷). They may want to fish or hike. At night,people use sleeping bags and build a bonfire(篝火). The bonfire can keep people warm and cook food. People often roast marshmallows(烤棉花糖).
- 出版日期2019
