为了更多地了解蜜蜂怎样识别自己的巢穴，彼茨-辛格的研究小组把玻璃管切割成三部分，然后用干净的管材调换了外面部分，中间部分，或者把二者都换掉。

To learn more about how bees recognize their nests, Pitts-Singer's team cut the glass tubes into three sections, then replaced the outer section, the middle section, or both, with clean tubing.

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