However, food boxes' position with respect to the surroundings could be changed by revolving either the inner cage containing the birds or the outer walls, which served as the background.

但是，通过旋转鸟笼内部（鸟在里面）或者旋转充当背景的外墙，餐盒与周围环境的相对位置可能会发生改变。

youdao

In another set of experiments, Kramer put identical food boxes around the cage, with food in only one of the boxes.

在另外一组实验中，克雷默在鸟笼周围放置了完全相同的食盒，这些食盒中只有一个食盒有食物。

youdao

His three children were outside, still in their pajamas, playing in the mud, with empty food boxes and wrappers strewn all around the front yard.

他的三个孩子仍穿着睡衣，在屋子外面玩泥，前院满地是空食物盒子和包装纸。

youdao

And the Extension Service at North Dakota State University offers other advice: Do not save plastic bags of food even if boxes or containers inside the bags appear dry.

VOA: special.2010.07.19

Mr Marriott said the charity was providing boxes of food to about 100 people every week.

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So Palin and her staff pitched in to supply food, including four boxes of brownie mix.

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Boxes of food supplies are piled up in the warehouse.

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